I dont think you actually know what a Ponzi scheme is, or if you do, you dont understand BTC. One of the two, possibly even both...
In other news - the world's largest asset manager with assets worth $5.7t, that's right, trillion - Blackrock, seem to like Cryptocurrency and blockchain technology, whilst suggesting it is only a very young emerging industry and people should only invest if they can stomach a total loss but see it gaining alot of momentum with time...
https://www.coindesk.com/blackrock-crypto-blockchain-report/
Investing is all about the future.