At least you admit you're speculating (we all are). They confidently just say its a foregone conclusion.
If they're actually that confident I hope they short the stock long term with basically all their money.
If you run a traditional short (borrow and sell the shares), you need to be right on the direction and the timing to make any money. One random surge in the price can kill your short even if said surge is short-lived.
I also speculate that OpenAI and Anthropic will crater, but I also expect that the market will remain irrational much longer then anyone shorting it today will remain solvent.
So yes, I believe it's going to leave a smoking hole in the ground, but I won't be betting money on it.