Earlier quoted context omitted.
Can the government seize Bitcoin directly? No. Yes, it can. The U.S. government has in fact seized Bitcoin directly and sold it at auction several times. It is arguably the single largest non-exchange seller of Bitcoin in Bitcoin's history.
It can only be taken in these events: 1) Seed phrases are discovered (ie. plaintext document or physical artifact). 2) Seed phrases are handed over by willing party. If #1 doesn't exist, then #2 is the only option.
Money can only be seized if the safe is found. And the combination is handed over by a willing party.
The difference is that money is actually more secure because you don't have a public ledger telling you that it exists and who owns it and how much of it they own as you do with the public cryptos like Bitcoin and Ethereum.