It just seems likely that the coins will simply never move and the longer they don't move, the likelier that is to remain. And it keeps everything simple, nothing moves, nothing is really burned, they are just all where they are. Any coins that have not moved in the last ten years, would seem unlikely they will ever move at all, except for those few miners who were not Satoshi, and there will be news when a coin mined in 2009 moves.
satoshis 1st coins were P2PK (pay to public key) so are vulnerable to attack by quantum computers as the public key is known. but then satoshi went to P2PKH (pay to public key Hash) so will remain.. so early coins will be swept up when quantum computers get powerful enough. 10-20 years is whats ive read.
...maybe. as i barely know any of this. so someone correct me if wrong please.