even the usdt don't matter dollar is dollar.
Dollar is dollar; but centralized shitcoins like tether that are controlled and issued by a centralized authority that can freeze your accounts, steal your money, get dumped to 0, etc. are not dollar. So if you want to bag hold something as risky as the US dollar while global dedollarisation is speeding up and countries may dump US treasuries (China has already liquidated hundreds of billions) then do yourself a favor and just bag hold dollar itself.
He must really be delusional; saying dollar is dollar in the first place shows that he is ready to sink himself somewhere without even realising it.
Imagine buying and holding USDT, which was later found out to be among a wallet, which the three later governments decide to blacklist. That's the end of it all, as the fund will be frozen even if it's not on a centralised exchange.