These people will hold and buy Bitcoin for the rest of their lives.
Half of all Bitcoin hasn't been moved in 2+ years, despite multiple -50% moves.
The price went from 20k to 2k and most wallets didn't even have a coin move from it.
Presumably a big chunk of this is permanently lost due to lost keys, etc.
I dunno, there are feedback mechanisms that could keep this thing alive for a long time. And if not BTC then certainly some crypto based on the concepts.
You could always try to find the bigger fool unless you block the conversion between crypto and real money.
Anyway, this kind of schemes always come crashing down. There will be not a lot of people willing to catch a falling knife after some point.
At some point you have to round something to zero.
That's 1/2 pow 52*5! There are not enough atoms in the universe to sustain such a fall.