I think the metal in US coins is worth something, so even assuming paper currency is worthless the coins are worth more than all of the cryptocurrency, which is

I think the metal in US coins is worth something, so even assuming paper currency is worthless the coins are worth more than all of the cryptocurrency, which is worth zero. Of course there’s always a greater fool who will pay something for a dogecoin, just like there’s always a greater fool who will pay 25 cents for a penny.