The 81 crash was caused by 2 presidents. Carter, who set up the conditions for a crash and Reagan who didn't recognize it soon enough. But once Reagan did recognize it he turned it around into a boom economy in a matter of months. The Bushs.... who cares. I was never a fan of either, especially George H.W.. They governed a bit too much like Dems. But even so the house bubble collapse happened when the Democrats won control of Congress and Bush just rubber stamped everything Congress sent him. That is when Bush said the dumbest thing of his entire administration, "Sometimes you have to abandon the free market to save the free market".
But what Obama brought us close do and what Biden will finish is a complete and total collapse of the economy. Our dollar will be worthless. This is because Biden has committed us to the Great Reset. That is when the global Socialist get to celebrate the demise of Capitalism for about a day and then realize what a massive colossal mistake they made because now there is no food to eat. No more clothes to buy, no more iPhone, iPads, and everything else because they have killed what has been supporting them and they never understood that.