Design a blockchain system where it's agreed upon consensus and use/adoption is voluntary through democratically elected processes (save regulatory capture), and we'll have a good system that's not unnecessarily and unreasonably transferring wealth from later adopters to earlier adopters. You won't be able to make a fortune on it by buying it and pumping it to make its value goes up, nor will you be able to make money selling shovels to desperate or greedy or gullible people once they catch wind of the "gold rush."
The one major benefit of all if this craziness is that the flood of money into blockchains has meant technology development and many more engineers with experience; whether there are engineers who'd work on non-Pyramid/MLM-Ponzi scheme blockchains though, if they're financially incentivized/aligned with Bitcoin et al, that's TBD.