Most of the crypto price consists of speculative value. I'm sure that 95% of people involved would never invest in bitcoin or altcoins if they knew the price would be fixed. Hence, cancer pills of certain brand (which would be in limited supply despite the ingredient being open source) would be valuable if you could trade them online and make money flipping them with easy access available to everyone. People love gambling, stock markets, penny stocks, online casionos, sports betting are all blossoming and there's a lot of speculation hungry money in the world.