Right, I didn't mention anything about profit or debt.

The question is whether this is a bubble that's going away - whether "AI will just be turned off". A revenue trajectory indicating a vast increase in actual consumer/enterprise usage every year indicates otherwise. This is true regardless of whether or not forward-looking investment becomes too much at some point. If CSPs or AI labs have bought more compute than they can sell at current prices, maybe they'll go bust, but at that point supply and demand mean compute and therefore AI inference becomes much cheaper, which is unlikely to make it go away.