One thing a lot of people do not like about the fediverse is that you can only sign in on the instance you signed up on.
If only there was a simple solution, a way to login everywhere and ensure that it's always the same person.
Something public that could identify the person and something private the person could use to prove it's them.
Soo.. Who's going to build 'sign in with Ethereum' (or public/private keys) for the fediverse?