Blockchains have the power to change the way our society functions if we can figure out the scaling and ease of use part. The decentralize ledger can change not only commerce, but logistics and democratic processes. We really are at the beginning of this thing. For those that are saying quantum computing will make blockchains useless... we aren't even close to figuring out how to do that. Not saying that we can't figure it out, but if we can control quantum mechanics, then our species enters a whole new realm of technical possibilities that are beyond even the blockchain.