TSLA recently announced their 1.5B BTC purchase and now the question is if this is the beginning of the end for BTC. Basically if TSLA stock start going down other companies will not be wanting to buying BTC. BUT if TSLA stock start rising then other companies will follow suit. This is why watching the TSLA stock price is interesting right now and it seems like there is some support.
TL;DR If TSLA start going up again more companies might follow suit and buy lots of BTC themselves.