I did not liked the board saying "safeguarding Satoshi's Stash" everyone's Satoshi's are important. Well I read the blog (only 80%) it was good, if some rich dude or whale gets their hand on a quantum computer, they will surely need some great resources for that, I mean owners are not just going to release QCs as they releases AI models which I doubt they were already using for a long time.
Same way, QCs owners will only publicize it after lots of documentations, government might involve too because not only BTC is vulnerable to it. World has been digitalized and most of the technologia are vulnerable to QCs.
Proper supply should be tracked, like who bought it, proper usage should be taught, so combined rich people definitely need many resources to pull this off.
I think it would be better if someone from Usa or any other country, with functional QCs comes forward and says we will, break the old or most vulnerable wallets, and not seize, or release the supply back to the market, but will give it back to the right full owner by taking some commission. But it will still dump the btc due to the reasons it was famous will be no more like,
Conservatism
Forward Compatibility
Censorship Resistance