Me too but I know several financially smart people who acknowledged in private it was a giant bubble of thin air, but they had the trader mentality that it doesn't matter what the real price should be, as long as there is money to be made trading it. As long as they didn't get caught in the end, I don't think they were wrong.

By the way, it's not just a lot of second hand GPUs that will come back to the market. A lot of quants too!