Yo,
So apparently there's like 4-6 million bitcoin that are lost and gone? Just curious if there was any ideas or plans to update the protocol to replace the lost bitcoins if there was a consensus, if that is even possible.
There is no protocol as that. Once Bitcoin is lost, it is gone forever. It cannot be recovered or reintroduced into the market's circulating supply. Any efforts to replace lost Bitcoin through a protocol or update is impossible, besides it would compromise the fundamental nature of the currency.