In the short term, crashing the crypto market can ease demand for semiconductors, but in the long term, getting cryptos to move to Proof of Steak will hopefully ease it up for good (But don't quote me on that!)
It's no secret that one of their biggest supply chain constraints is chips right now (aside from batteries.) So it's not all that ridiculous to imagine them pulling this kind of publicity stunt off so that they can actually produce and sell more cars. And if they can profit off of it at the end of the day, even better!