> For almost every use case, global, trustless consensus is not needed, and thus a blockchain is not needed. This is ridiculous. Try trading stocks without con

> For almost every use case, global, trustless consensus is not needed, and thus a blockchain is not needed. This is ridiculous. Try trading stocks without consensus. Play a game, any game. Even better, try exchanging public keys on an adversarial network with no pre-shared secrets or global state. And what is ‘logging in to ethereum’? This might refer to centralized ethers.js front ends. The “you don’t need a blockchain” argument is usually either based on acceptance of trust assumptions that go mostly unnoticed, or attacking a strawman of some knavish startup. Blockchain is also not the same thing as cryptocurrency. It may be more legitimate to say “You don’t need a cryptocurrency”, in the same way that it doesn’t make sense to play Doom on an ATM terminal.