Earlier quoted context omitted.
Sounds like money better spent to me than the 5 trillion dollars in global fossil fuel subsidies in 2015, or 500 billion just in the US[1] That 5 billion number for Musk I think is a grand total of all subsidies, spanning all time. [1] http://www.sciencedirect.com/science/article/pii/S0305750X16...
I don't have to click any like to know that the US did not spend $5t on fossil fuel subsidies. I'm pretty sure the US only spent like $5t total in 2015, and most of that is in medicare and social security.
Why does the invented aspect matter? Because it's comical. It leads to the premise that over just the next 10 years, the subsidies are a likely cumulative ... $56 trillion or so (about 20%-25% of all wealth on earth). Aka, greater than the combined profit of every oil company in world history going back ~140 years.