I think you highlight the problem with crypto speculation, it does not produce any revenue, so the price appreciation is only governed by new speculators bet that a greater fool will buy it. When you trade there must be a seller and buyer, the value of the untraded part is only a potential value and not real value, as soon as you put it for sale, there will be more supply than demand and the price plummet, as it happened with FTT. The total supply may have been valued at billions of dollars even thought only few millions have been bought, so the collapse just transfered the wealth to the ones who sold above the real money that was put into it. I think it is a zero sum game as there is no revenue, only speculation.