Probably the concentration of a too-big-to-fail percentage of capital into a single digit number of tech companies, many of whom are engaging in circular financing deals between one another while also ransacking the entire consumer electronics space.
something like 25% of the current American GDP growth is because we're shoveling money into AI companies that have no idea how they're going to pay it back beyond selling subscriptions to chat bots, much of the world will take a hit on that crash