He is definitely looking to do something in retaliation to the government stating they wish to tax the rich.
So he is looking for a outlet so to avoid doing so in curtailing the sell-off of his own companies stocks and putting it into bitcoin.
USA govt is not that innocent that they will let MUSK run away with 20 billion USD unnoticed. He will definitely buy BTC from some centralized exchange where he can be traced and taxed. So I dont think this can ba reason.
I hate to admit the fact that Elon really makes this market a place circling his funds and assets , though I hate to believe that there is a chance that this tweet again makes the increase of Bitcoin price yet most of the currency he will
But the credit goes to crypto community for making him so popular in the crypto currency in such a short span of time after Craig White. We pay unnecessary attention on such people tweets and claims that serves their purpose.