Short answers to common questions about Bitcoin casinos, Duel, Bitz, bonuses, payments and safety.
These answers are based on information the operators publish and general crypto knowledge. Online casino legality depends on your country, so always check local law and the operator's terms. We never quote fixed fees or confirmation times, because they vary with network load. Both operators hold an international Anjouan licence rather than a local one, and some details, such as Bitz wagering terms and Duel deposit-limit tools, are not published or could not be confirmed. Where that is the case, the answers below say so. You must be 18 or older, or the higher legal age where you live.
The question-and-answer list at the end of this page covers the quick points. The sections below go deeper by topic, so you can jump to what you need: the basics, legality and licensing, the two operators, bonuses, payments and coins, withdrawals and verification, safety, and responsible play. For a ranked comparison see the full ranking, or start from the home page.
Facts used throughout: Duel is rated 9.6/10 and Bitz 9.4/10 on our comparison of published terms. Both hold an Anjouan licence. Duel has no traditional welcome bonus but pays instant rakeback; Bitz offers a 200 % crypto match plus 250 free spins, up to 1,500 USDT. Promo code KINGZWIN is listed for both.
Bitcoin casino basics
What makes a casino a "Bitcoin casino"?
The label simply means the casino accepts Bitcoin, and usually other cryptocurrencies, for deposits and withdrawals. The games are the same kinds you find elsewhere: slots, table games, live dealer games and in-house titles. What changes is the payment layer. Instead of cards or bank transfers, funds move on blockchain networks, which can make transfers quick and cross-border, but also irreversible and dependent on network conditions.
Is a crypto casino different from a normal one?
In day-to-day play the games feel familiar. The differences are in payments, privacy expectations and regulation. Crypto transactions cannot be charged back like card payments, wallets are your own responsibility, and many crypto casinos operate under offshore licences rather than the licence of your home country. That last point matters for protection and legality, which we cover below.
Why would anyone choose Bitcoin over a card?
- Withdrawals can be quick when the operator processes them quickly.
- You are not tied to your bank's rules on gambling transactions.
- Stablecoins let you play in a dollar-pegged unit.
The downsides are real too: no chargebacks, wallet mistakes are final, and price swings can affect your balance if you hold a volatile coin.
Legality and licensing
This is the question that matters most and the one we can answer least precisely, because the answer depends on where you live. Some countries license online casinos domestically, some allow players to use foreign sites in a legal grey area, and some prohibit online gambling outright. An international licence does not override your local law.
| Question | Answer |
|---|---|
| Does Anjouan licensing make play legal in my country? | No. Local law decides that. |
| Is it a licence from my national regulator? | No, so local regulator protections do not apply. |
| Can the operator still restrict my country? | Yes. Operators keep their own lists of restricted countries. |
| Who can I complain to? | Start with the operator; review the terms for any dispute process. |
How should I check whether I am allowed to play?
- Look up your country's gambling rules on an official government or regulator website.
- Check your local minimum gambling age, which may be higher than 18.
- Read the operator's terms and its restricted countries list.
- If anything is unclear or the answer is "not permitted", do not register.
We have written short country guides that describe the local context where we have verified it: Canada, Germany, Finland and Norway are examples. They are informational, not legal advice, and we never encourage getting around local restrictions.
About Duel
What is Duel known for?
Duel does not offer a traditional welcome bonus. Instead it pays instant rakeback on every bet, and Duel Originals are stated to have a 0 % house edge within a daily limit. It accepts BTC, ETH, USDT, USDC, SOL and TON. Payouts are advertised as instant, though some withdrawals go to manual review and KYC may be requested before withdrawal. Our Duel review has the full breakdown.
What does "0 % house edge" really promise?
It describes the game design, not your results. A game without a built-in casino advantage can still produce a losing session, because outcomes are random. The daily limit also matters: the statement applies within it, and we have not confirmed how it is defined. Read Duel's own explanation before relying on it.
Does Duel have deposit limits?
We could not confirm deposit-limit tools from public information. If you want limits, check your account settings, ask support, and consider controlling exposure yourself by only funding what you can afford to lose. See responsible gambling for practical limit-setting ideas.
About Bitz
What does Bitz offer?
Bitz offers a 200 % crypto match plus 250 free spins, up to 1,500 USDT, with slots from big providers and a live casino. Withdrawals are stated as processed in up to 10 minutes. Supported crypto is USDT, USDC, BTC, ETH, SOL, TON and Lightning. The Bitz review goes through the strengths and gaps.
What is not published about Bitz?
The wagering requirement, the free-spin game and the maximum bet are not published in the headline offer. That is why we tell readers to read the promo terms before depositing. We do not guess at these details.
Which operator should I try first?
| Aspect | Duel | Bitz |
|---|---|---|
| Rating | 9.6/10 | 9.4/10 |
| Licence | Anjouan (international) | Anjouan (international) |
| Bonus model | Instant rakeback, no traditional welcome bonus | 200 % match plus 250 free spins, up to 1,500 USDT |
| Withdrawals | Advertised as instant; some go to manual review | Processed in up to 10 minutes |
| Coins | BTC, ETH, USDT, USDC, SOL, TON | USDT, USDC, BTC, ETH, SOL, TON, Lightning |
| Unknowns | Deposit-limit tools unconfirmed | Wagering, free-spin game, max bet unpublished |
If you want ongoing returns and simplicity, start with Duel; if a large starting bonus and Lightning support appeal, look at Bitz. You can open Duel or Bitz from these links, and the ranking page explains how they compare.
Bonuses and promo code
Which is better, a welcome match or rakeback?
Neither is better in general. A welcome match gives more funds up front but usually comes with wagering requirements, game weighting and maximum bet rules. Rakeback returns a share of your wagering and has fewer conditions, but it rewards activity and does not change the odds. Our bonuses guide walks through both with a clearly labelled hypothetical example.
What is KINGZWIN?
KINGZWIN is the promo code listed for both Duel and Bitz. Confirm the current offer with the operator, because promotions can change and terms may differ by country.
Can a bonus make me win?
No. A bonus adds playing funds or returns value over time, but it does not alter the probabilities of any game. Heavy wagering requirements can even make a bonus a net cost. If the terms are unclear, skip the bonus.
What should I check before accepting any bonus?
- The wagering multiple and whether it applies to bonus only or bonus plus deposit.
- Which games count and at what share.
- The maximum bet while the bonus is active.
- Expiry, withdrawal caps and country eligibility.
Coins, networks and payments
Choosing the right coin and network is the part of crypto gambling where mistakes are easiest and most expensive. The detailed walk-through is in our crypto payments guide; the essentials are below.
| Coin | Duel | Bitz | General note |
|---|---|---|---|
| BTC | Yes | Yes | Most widely recognised; price can move while you play |
| ETH | Yes | Yes | Fees vary with network load |
| USDT | Yes | Yes | Stablecoin; check which network you use |
| USDC | Yes | Yes | Stablecoin; check which network you use |
| SOL | Yes | Yes | Make sure your wallet and the deposit address match |
| TON | Yes | Yes | Confirm memo or tag requirements if shown |
| Lightning | Not listed | Yes | Fast, small transfers; subject to the operator's limits |
What is the safest way to make a first deposit?
- Pick the coin and, for multi-network tokens, the exact network the operator lists.
- Copy the deposit address from the cashier and verify the first and last characters after pasting.
- Send a small test amount first if the operator allows it and the fee makes sense.
- Wait for the required confirmations; the time varies with network load.
- Only then deposit the amount you planned.
Should I use Bitcoin or a stablecoin?
Bitcoin can change in value while you play, which makes your balance more volatile in fiat terms. Stablecoins such as USDT and USDC aim to track the US dollar, so your balance is steadier, though they carry issuer and network risks. Neither choice changes the casino odds.
Why did my deposit not arrive?
The common causes are low network activity or high load delaying confirmations, sending on the wrong network, a missing memo or tag, or sending below a minimum. Keep the transaction ID, check it on a block explorer, then contact support with the details.
Can I reverse a crypto transaction?
No. Once confirmed, a transaction generally cannot be reversed. Double-check addresses and networks before sending.
Withdrawals and verification
Speed depends on three layers: the operator's processing, any manual review or verification, and the blockchain itself. The operator's stated times only cover the first. See the fast withdrawals guide for a deeper breakdown.
| Factor | Effect |
|---|---|
| Operator processing | Bitz states up to 10 minutes; Duel advertises instant payouts |
| Manual review | Some Duel withdrawals go to manual review, which adds time |
| KYC | Verification may be requested before withdrawal |
| Network and coin | Confirmation time varies with network load |
| Active bonus | May block or cancel a withdrawal until wagering is complete |
Why would a casino ask for ID?
Operators may request verification to meet anti-money-laundering obligations, to confirm age, or to review unusual activity. If requested, supply clear, current documents and make sure your details match your account. Completing it early usually avoids a delay at the moment you want to cash out.
What can I do if a withdrawal is slow?
- Check the withdrawal status in your account and the transaction ID on a block explorer.
- Confirm that no bonus conditions are outstanding.
- Look for any verification request in your email or account messages.
- Contact support with your account details and the transaction information.
Safety and trust
Safety at a crypto casino comes from several layers: how the operator is licensed, how clear its terms are, how you protect your own accounts and wallet, and how you control your spending. Our crypto casino safety guide covers these in depth.
How do I protect my account?
- Use a unique, strong password and enable two-factor authentication if available.
- Only use the operator's official site, reached from a link you trust.
- Never share verification codes or wallet seed phrases with anyone, including anyone claiming to be support.
- Keep only what you intend to play with on the casino; hold the rest in your own wallet.
What are red flags?
Unclear or missing terms, pressure to deposit fast, requests for your seed phrase, promises of guaranteed profit, and refusal to explain withdrawal conditions are all warning signs. Walk away from any site that shows them.
Responsible gambling
Gambling is entertainment with a cost, not a way to make money. Set a budget before you start, set time limits, never chase losses and never gamble with money needed for essentials. Warning signs include hiding play from family, borrowing to gamble and feeling unable to stop. Free, confidential support is available from Gambling Therapy, and our responsible gambling page explains limits and self-exclusion.
How we compare operators
Our ratings come from comparing published information, not from claims about personal play. We look at licence details, supported coins, the clarity of bonus terms, the withdrawal policy as stated, and how openly an operator describes limits such as manual review or KYC. Where a detail is not published, we mark it as unknown rather than filling the gap. Ratings are an editorial summary, not a guarantee, and they can change when terms change.
Why only two operators?
We would rather rank a small number of operators whose terms we can describe accurately than list many we cannot. If an operator is not covered here, that says nothing either way about it; it simply means we have not reviewed it.
Scenario-based advice
| If you... | Then... |
|---|---|
| Are new to crypto | Start with a stablecoin, read the payments guide and test with a small transfer |
| Care most about quick cash-outs | Complete verification early and avoid active bonus conditions |
| Want the biggest starting balance | Read the Bitz promo terms in full before depositing |
| Want no wagering to clear | Look at rakeback rather than a match bonus |
| Live somewhere online gambling is restricted | Do not register; follow your local law |
| Feel you are losing control | Stop, take a break and contact Gambling Therapy |
Common mistakes to avoid
- Skipping the terms. Most disputes come from conditions nobody read.
- Using the wrong network. A deposit sent on an unsupported network may not be recoverable.
- Depositing more after a loss. Chasing losses is the fastest route to harm.
- Leaving large balances on site. Withdraw winnings you do not intend to play with.
- Assuming a licence means protection. An international licence is not the same as local regulator oversight.
- Believing a bonus is free money. Wagering requirements turn it into a cost you should calculate.
Glossary
| Term | Plain-English meaning |
|---|---|
| Anjouan licence | An international gambling licence, not issued by your own country |
| Rakeback | A share of your wagering returned to you |
| Wagering requirement | The amount to bet before bonus winnings can be withdrawn |
| KYC | Know Your Customer identity verification |
| Stablecoin | A crypto token designed to track a currency such as the US dollar |
| Lightning | A layer on top of Bitcoin for fast, small payments |
| Confirmation | A blockchain network step that makes a transaction final; timing varies with load |
| House edge | The built-in statistical advantage of a game for the casino |
Quick questions by country
If you are looking for context in a specific country, these pages summarise what we have verified: New Zealand and Ireland, alongside the four linked earlier. Each one repeats the key rule: an Anjouan licence is not a local licence, and local law always comes first.
How to use this FAQ
Treat these answers as a starting point. Check your local law, read the live terms of any operator, keep deposits within a budget you can afford to lose, and use the ranking and the bonuses guide when you are ready to compare. Gambling carries risk, 18+ only.
