Crypto casino review
21Bit Casino review 2026: crypto, cards and bonus value
21Bit is run by Dama N.V. under a Curaçao licence and opened in 2022. It is tagged as a crypto casino and lists cards and e-wallets for deposits. Below: payments, KYC and what a match bonus is worth after wagering.
At a glance
21Bit facts
- Licences
- Tobique
- What it means: The licence decides who you can complain to. Curaçao gives fewer routes than Malta or the UK.
- Operator
- Operated by Dama N.V
- What it means: Dama N.V. also operates BitStarz and Bitkingz, which we review.
- Year founded
- 2022
- Games
- 4,000
- Estimated RTP
- 97%
- Software providers
- Playtech, Pragmatic Play, 1x2 Gaming, BGaming (+1 more)
- Deposit methods
- Binance Coin (BNB), Bitcoin, Bitcoin Cash, Cardano, CashtoCode, Dogecoin (+10 more)
- Languages
- English, Portuguese, Spanish
- Currencies
- US dollars, Euros, Australian dollars, Canadian dollars, New Zealand dollars, Crypto currencies
21Bit in brief
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Dama N.V.
21Bit is run by Dama N.V., which also runs other crypto casinos we review.
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2022
The brand opened in 2022.
-
Fiat
US, Euro, Australian, Canadian and New Zealand dollars are listed as currencies.
-
40x
At 40x wagering on a 96% RTP slot, the expected loss is larger than a 100% match bonus (example terms).
Coins and networks Live
Coins and networks at 21Bit
The coins 21Bit lists minimum deposits for, linked to our coin pages. Networks are not listed, so check the cashier for each coin.
| Coin | Deposit | Withdrawal | Minimum |
|---|---|---|---|
| BTC Bitcoin | ✓ | – | 0.0001 BTC (about $8.2) |
| ETH Ethereum | ✓ | – | 0.01 ETH (about $24) |
| USDT Tether | ✓ | – | 5 USDT (about $5) |
| TRX TRON | ✓ | – | 10 TRX (about $3.3) |
| LTC Litecoin | ✓ | – | 0.01 LTC (about $0.6) |
| DOGE Dogecoin | ✓ | – | 1 DOGE (about $0.079) |
| XRP Ripple | ✓ | – | 0.001 XRP (about $0.0013) |
| BNB BNB | ✓ | – | 0.01 BNB (about $7.3) |
| BCH Bitcoin Cash | ✓ | – | 0.001 BCH (about $0.28) |
| ADA Cardano | ✓ | – | – |
Before you send
Use the deposit address and network the cashier shows for each deposit. A coin sent on the wrong network, or to an old address, is usually lost.
Send a small test amount first.
Coins from the payment methods listed for this casino on our site; – means not listed yet. Confirm the network in the casino's cashier before you send. Dollar values use the coin's live price.
KYC and withdrawals Live
When 21Bit can ask for ID, and how a crypto withdrawal works
Its terms ask for ID at sign-up. We have not timed its payouts.
- Stated by the casino At sign-up
- Licence Curaçao
- ID checks At sign-up
- Pick coin and network Choose the coin and network in the withdrawal form and paste an address from a wallet you control on that same network.
- Expect a check Licensed operators can ask for ID, proof of address or source of funds before paying out, most often on a first or large withdrawal.
- Check the fee The network fee is taken from the amount or charged by the casino. The cashier shows which before you confirm.
Read 21Bit's own terms before you deposit.
Pros and cons
What works at 21Bit, and what to watch
What we like
- Cards and e-wallets Visa, Mastercard, Maestro, Revolut and MiFinity are listed.
- Known operator Dama N.V. runs other brands we review.
- Several fiat currencies USD, EUR, AUD, CAD and NZD are listed.
Worth knowing
- Networks not listed Minimum deposits are listed per coin, but not the networks.
- Offshore licence Curaçao only.
- Young brand Opened in 2022.
Bonus maths Example data
What a 21Bit match bonus is worth after wagering
Example terms, not the casino's: a 100% match on a $500 deposit with 40x wagering on the bonus. Put in the match and wagering from 21Bit's own bonus terms to see its offer.
| Game you wager on | Bets needed | Expected loss | Bonus value | After a -10% move | After a +10% move | What it means |
|---|---|---|---|---|---|---|
| Crypto dice at a 1% edge (1%) | $20,000 | $200 | $300 | $250 | $350 | the only row where the bonus keeps most of its value, and only if dice counts in full towards wagering. |
| Slot at 97% RTP (3%) | $20,000 | $600 | −$100 | −$150 | −$50 | the expected loss is larger than the bonus, so on average you finish below your deposit. |
| Slot at 96% RTP (4%) | $20,000 | $800 | −$300 | −$350 | −$250 | the gap grows with every point of house edge; a lower-RTP slot loses more. |
Bets needed = bonus × wagering$500 × 40 = $20,000
Expected loss = bets × house edge$20,000 × 1% = $200
Value after a move = bonus × (1 + move) − loss$500 × (1 − 10%) − $200 = $250
Example terms. Computed: bets needed = bonus × wagering; expected loss = bets × house edge.
Our take: 21Bit is a crypto-tagged casino with card deposits from an established operator. Check which coins and networks the cashier offers before you deposit.
21Bit FAQ
Who owns 21Bit?
21Bit is operated by Dama N.V. under a Curaçao licence.
Which cryptocurrencies does 21Bit accept?
Minimum deposits are listed for BTC, ETH, LTC, BCH, XRP, DOGE, BNB, TRX and USDT, including 0.0001 BTC, 0.01 ETH and 5 USDT. Networks are not listed, so check the cashier, and see our coin pages for what each coin costs to send.
Can I deposit with a card at 21Bit?
Visa, Mastercard and Maestro are listed, along with Revolut, MiFinity and CashtoCode.
Does 21Bit ask for ID?
Yes. Its terms ask for ID at sign-up. Have your documents ready when you register.
Is the 21Bit bonus worth it?
Use the bonus calculator with its own match and wagering terms.
Play safely
Crypto makes it fast. Set the limits first.
18+ only
Every casino we list sets an age limit, and some countries set it higher.
Responsible gaming →Transfers are final
A crypto deposit cannot be charged back. Send only what you can afford to lose.
Set a budget →Prices move
A coin balance can fall in value while you play. Stablecoins remove that swing, not the house edge.
Stablecoins →Get help
Free, confidential help is available if gambling stops being fun.
Gambling addiction help →