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If it is the case that the cracking relies on a known public key

Then every visible or reused address is doomed, i.e. at least half of the CEX cold storage, every p2pk utxo, and I'd estimate about 90% of stackers' wallets.

So... maybe you can do something today.

business

That business already exists and afaik Peter just got crowned king of it.

every visible or reused address is doomed

I get reused addresses being doomed, but a pay to script hash or p2wsh? wouldn't these be safe until in the mempool?

Peter just got crowned king of it

he might need competition?

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but a pay to script hash or p2wsh?

if they're reused yes. if they're not reused, then you need to set something up in advance, otherwise it'll depend on ecdsa and is essentially the same as a single use p2pkh/p2wpkh. Personally I don't think I'll be rich enough to transact within the barrage of wallets getting swept tho.

competition

Also already there. So as appealing as it sounds to get rich off of other people's misery by rentseeking, I wonder, if you're not established by now, how are you going to be able to compete yourself? And if you already have this product, how are you not going to get disrupted by, say, foundry offering it cheaper and with a delivery guarantee?

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Clearly I need to think more deeply about this.

What is your plan?

(in the event that something like this happens)

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The moment I'd see something that looks really bad, I'll reduce liquidity on LN to a bare minimum. If there is something feasible in a hybrid p2wsh, I'd dump it to there. Otherwise, I'd just let it sit in p2wpkh and see what's what. I haven't reused addresses since... 2013.

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