Perhaps at current rates of usage. But usage grows exponentially. Also you just proposed a way to use it up even faster.
Actually what I proposed is for two slightly different sources to compete for the same market. Also, since the coal source is set to last for a long time, I think future generations will have nuclear power by then.
Here's another interesting concept. In India there are many workers who make there living off of charcoal production. There may be an economical way for those charcoal producers to become gasoline producers. It would probably only be economical in countries where the gasoline price is artificially high (taxes).