A Ponzi scheme is a form of fraud that lures investors and pays profits to earlier investors with funds from more recent investors.
A financial bubble is a situation where the prices of an asset or an asset class rise rapidly and excessively above their intrinsic or fundamental value. This is usually driven by speculative demand and irrational behavior.
Bitcoin is more of a bubble than a fraud.
As to who's recruiting me to invest, well aside from the ET bitcoiners, there's dozens of Youtubers and soon to be major players like Vanguard and Blackrock.
Anything the Government gives you is a ponzi, and if they run out of money they print more.
FWIW it think BTC is a bubble and will end badly for the HODLers. I'm long BITO until the trend changes.