I know it is a tricky question. What do you think, how many Bitcoins are lost forever and are 'out of the network' by lost private keys?
That's a good question! I guess that is very difficult to know at this point. I think that we will only be able to find how many
BTC are lost after they are all mined. Or we can probably research the blockchain and find a pattern that could lead us to see how many BTC could be outside of the network.