> That's purely due to sanctions, which can affect cryptocurrency as well due to the entire ledger being public.

Woah boy, that's a lot to unpack. I guess you heard some news about recent sanctions to TornadoCash... and then you thought that cryptocurrency can be confiscated/frozen as what happened with Russian's USD reserves?

What has happened so far: some arrest of at least one developer, some freezing of some (centralized-)stablecoin accounts, some closure of github accounts, etc. But pure (as in, not centralized stablecoin) cryptocurrency stored in cold wallets cannot be frozen at all; and that's the whole point of cryptocurrency.