I wouldn't classify myself as a Elon Musk fanboy. I personally own a tesla car, and a tesla powerbank (actually pretty useful), but I don't follow Elon Musk and his interviews/videos/articles that often.
I've seen his previous thoughts on Bitcoin, and while we share some of the similar ideas (which is kinda cool), there are some disagreements that I have with him. I don't understand why he believes it's energy-intensive. When comparing the miner electricity fees compared to a lot of other businesses, it's minuscule. Banks spend a lot more electricity maintaining their systems, and bitcoin mining has seen a slow transition to more renewable energy sources.