Yeah, granted, the creator of bitcoin _might_ be, effectively, operating a very complex Ponzi scheme, but it seems unlikely. Occam’s razor says that they were a sincere person or group with unconventional economic theories.

The creators of small memecoins often are doing this, deliberately, of course. Some of them are amazingly open about this, often marketing their memecoins as, essentially, “it’s still early” (ie you, the buyer, get to get in before the scheme collapses; like early Madoff customers, you can be one of the lucky ones!).