I don't know where you live, but here in the US the IRS simply has to ask you if you have a foreign (or crypto) bank account and you'd smart not to lie to them.

I don't know where you live, but here in the US the IRS simply has to ask you if you have a foreign (or crypto) bank account and you'd smart not to lie to them. If they can't get the money because they don't have he private key they can simply put you in prison.