>As a result, I am offering to buy 100% of Twitter for $54.20 per share in cash, a 54% premium over the day before I began investing in Twitter and a 38% premium over the day before my investment was publicly announced. My offer is my best and final offer and if it is not accepted, I would need to reconsider my position as a shareholder.

This seems like he's mostly trolling them or looking for an excuse to sell. The chances they accept and he can get 100% seem low, this is a one-time offer with something of an ultimatum, and it seems a bit unlikely he wants to share that much Tesla to get the money in the first place.