Elon Musk have serious business enterprises that make a change in real life and let him have some entertainment once in a while by trolling the investment community be it in the cryptocurrency or in the stock market space and he keeps on repeating it often and all of his tweets are gaining much popular than anything i have seen in the public space and these sort of pump will not last forever.
I am not against him having some fun, he is a very weird dude and I can't really say that he did smart investments, he got money from both his own pockets into spaceX and also government and many other investors just to even make it feasible to reach to this level, and I am pretty sure that he is still not putting up any profit at all right now no matter how many satellites he is taking to the space.
Secondly tesla is one of the biggest car manufacturers in the world right now, they are literally building robotic systems that will put the cars together and trying to reach the demand they are getting, that is how much they are selling right now, yet they weren't profitable until very recently, don't know if that changed.
So long story short, "having fun once in a while" is fine and all but while you are losing money in billions, have fun in your own home or at least not out in public against the whole globe, find something that is not viewable by 2+ billion people.