Well I do. Or at least I did.
He made electric cars sexy. They were decidedly unsexy before he bought Tesla.
He gave us reusable rockets. Without that, the US would now be embarrassingly dependent on Russia's Soyuz.
He also contributed something to PayPal. I don't know what, and I personally hate PayPal, but some people clearly love it.
Up to this point, he came across as a genius serial entrepreneur. I don't know if this was just luck+money, or that he really had some talent that contributed to these successes, but after this, people started lauding him as a real-life Tony Stark, and he apparently started to believe a bit too much in his own genius, and he started to do increasingly stupid things.
But there absolutely was a time when the hype seemed absolutely justified.