More that flip flops - the guy has the impulse control and general behaviour of someone afflicated with mania.

also taking crypto gambling advice from one of the worlds richest people when you have 10k in the bank might not be a good idea either

Is it a flip flop or did he just... change his mind? I mean, the guy has a long history of tweet-first-think-later. It seems not unreasonable to me that he got suddenly and violently into cryptocoins, did the same thing people here do every week when they learn about it for the first time, and then (being a billionaire) had trusted folks come to him to carefully explain all the externalities and his generally-strong-if-highly-distractable analytical mind made a different decision with better evidence.

I mean... I'm not saying Tesla's weird daliance with and then rejection of Bitcoin is particularly rational. I'm just saying it doesn't seem insincere.

You mean changing your mind? The similarity to politicians is because he attracts the same attention politicians do. It's not the politician that's the same, it's the polity.