Honestly this is so rigged, we need an global agency to go and fight against such actions. First Elon Musk buys a lot of Bitcoins when they are cheap, then he goes and promotes them on Twitter to get the price to rise. Once the price rises he is just selling his coins with a nice profit. After that he is just stop promoting BTCs and saying that Tesla won't accept BTC anymore. I wouldn't be surprised if he starts to buy coins again when the price is down to 30,000 or 20,000 USD.
Now we want a agency to defend us, isn't decentralized platform meant that we should be independent and I think that it will defeat the purpose of decentralization since there is an external force that is intervening. If that was to ever happen, you all better have some bitcoin ready because that is a good opportunity to get a really good profit because he will be pumping it real hard.