It seems that law-abiding citizens often bear the greatest risk by declaring their assets to tax authorities and relying on so-called "trusted custodians" for savings. Ironically, for many, the safest course of action is likely non-disclosure, though this is, of course, illegal in much of the world.
I only have to declare crypto < 1 year in my holding which means that, while technically illegal to buy 1 second after the new tax year start and not declaring it, in practice, obviously, no-one cares about that. Especially as crypto is not a 1 second buy; it can take hours.