According to some laws in America people have obligation to pay taxes on their income and crypto is not specified, but it's in a group of things to be taxed.
I read somewhere that, maybe someone can find something about that matter.
There are really certain countries that requires you to pay taxes, because it was law regulated and you are obliged to follow the rules if not and they found and then jail is your next destination, so it is fine to go and pay taxes rather than going to jail, so lucky if your country is not requiring you to pay.