The price goes up due to F. A, it's normal whenever there's a good news about how bitcoin is accepted or bought by a big industry the price starts pumping immediately most times its fomo, people don't want to miss out on the pump I can remember when PayPal accepted bitcoin that was the beginning of this crazy pump , anyway IMO even without tesla buying bitcoin it would have still hit the $50k  mark, it was always going to happen although it would have taken a bit longer to happen maybe a few weeks or a month.