I'm hoping they don't buy back, but instead agree to start accepting it again.  This would probably be better news for the market.  Elon said that Tesla would start accepting again once it was shown to not be so harmful for the environment, and I believe that's been demonstrated beyond his requirements.  Elon also said that Tesla would pump but they would never dump, and then he dumped nearly a billion dollars worth of BTC on the market, so you can take what he says with a grain of salt.  I do hope this ends up being a positive somehow though.