It's a dumb analysis of the situation that ignores what would actually happen:
A new wallet cert would be created that uses more bits. Enough that a brute force even with a quantum CPU would take too long. Then you transfer the funds to the new wallet. Abandoned wallets might be claimed during this transition but overall the deflationary trend of btc won't really be effected long term.
A new wallet cert would be created that uses more bits. Enough that a brute force even with a quantum CPU would take too long. Then you transfer the funds to the new wallet. Abandoned wallets might be claimed during this transition but overall the deflationary trend of btc won't really be effected long term.