Quote from: Videlicet on April 25, 2017, 04:19:03 PM

Even if Bitcoin forked and updated their keys, all previous keys "including satoshi's" will be rendered vulnerable and if they are cracked someone would be able to dump those early BTC on the markets. Upgrading the keys requires you to also have all keys from previous moved into a more secure key.

Thank You,
Viz.

this also make all the lost coins vulnerable, because no one can move those anymore, but perhaps if they hard fork to make the network resistant to quantum, they can also change something in the code to recover all those key, or better make them useless in the new chain, even so if someone with quantum want to break those old key he/she will have worthless coins