In “official locations” that check into an official database, that could possibly be true, but it won’t stop people themselves from buying stuff, which would then be completely “off the books”. If necessary a “black market” will grow up around it. And no government has EVER been able to stop black markets. They try, but they never succeed.
Once “cash” is taken off the market ... this will take its place! It will be your safety valve.
If your transaction is electronic it’s traceable, if it’s traceable it’s traceable to you, if it’s traceable to you it can be shutdown because it’s you.