Since Tesla is such a large company, it is very likely that they will find consumer who are willing to buy their cars with bitcoin. As I said, even though in the end they didn't reach Tesla's sale target with bitcoin, they have made huge profit from their adoption of bitcoin as a mean of payment in their company. I think they have a good strategy for bitcoin adoption.
If you are running a company that allows bitcoin payment you would convert them to fiat as soon as the sales takes place, you are not going to hold them because it is a high volatile market and what happens the market crashes all of a sudden and they will report a financial loss because of their inability and it will affect their stock price as well and their overall performance.