I saw some news of Elon musk becoming the world richest person and I know the recent bitcoin market rise is responsible for his new status.
It is funny that you think the recent Bitcoin Bullrun is happening for EM's new status!!

Do you know Elon Musk suspended the Bitcoin payment method for buying TESLA car? and he spread out rumor and encouraged people Not to use Bitcoin cause he think Bitcoin mining is not Eco-friendly??
Elon Musk is nothing but a social influencer, nobody cares about his status. Even if Elon Musk had not invested in Bitcoin, it is confirmed that this Bullrun is reasonable.
I totally agree with you on that Elon musk was not involved in bitcoin back then in 2017 and Bitcoin still did fantastically during that period, Elon musk is just an influencer looking for spots to take advantage of and he saw Bitcoin as a tool to make more profits.