To me, cryptocurrency just looks like a scheme. At the end of the day, we collect other people's money and call it gain. IT IS WELL!
Nah, although you are right to some extent like if we talk about BTC, those who waited years and did not sell their BTC they are selling now because of the increase in price, and we are buying now and motivating others to buy laters when there is dump and they will add more to the liquidity and we sell they left behind.
It really looks like a pyramid scheme until it is not because the price is driven by demand and supply and other macroeconomics factors and microeconomics factors, too. Due to this, there can't be any scams, but yeah, if all of a sudden people lose their faith in BTC and they start selling, I mean all of them, then we will be left with satoshi only, and that has no value, that would be a nightmare for everyone.