When a gambling site gives an offer to give a welcome bonus, they also add terms and conditions to their members. So when a member deposits $XX, they are eligible to get the welcome bonus. If the site has a reputation, that will not be a problem. But if the site is too shady, that will be too risky to use their welcome bonus because we do not know if there are any other terms and conditions behind that.

I wonder do you already search by yourself? I do not know about 22bet but in this forum, you can find many crypto sports betting sites and they have many good promotions you can take but always follow their rule.