>But when do we stop accepting transactions with ECDSA keys? I suppose at some point someone will try move 500,000 BTC from addresses that have been dead since

>But when do we stop accepting transactions with ECDSA keys? I suppose at some point someone will try move 500,000 BTC from addresses that have been dead since 2010. Hopefully we'll have a consensus by then. Why would you bother? The outcome is the same, either the user gets locked out of their coin or hackers gain access to the coin, meaning the user is locked out of the coin. There isn't a solution that doesn't resolve in one of those and if you aren't able to protect the user by doing it, why spend the effort?