Is a Tesla Car a better investment than Bitcoin? I'd answer no really, so yea I wouldn't (If I had that much anw). Plus, I don't particularly like cars myself, if I were to ask to choose then I'd rather get myself a motorcycle instead of a car. Heck if I had that much money, I'd rather invest more in Bitcoin and then invest here and there than buy a Tesla car.
Also how long will a person keep on holding till ages? Everyone's vision is to live a rich and luxury life you need a car, house & lot of stuff if his/ her dream car is Tesla then they will surely go for that. See holdings only works for those who are planning for long-term, so go ahead.
I don't think you'd even need the Tesla EVEN if you had a luxurious life already. Not to mention that 1 Bitcoin afaik can only buy around the cheapest (around there) version of the Tesla series. Not that I'm talking bad about it, but hey, if you're going to buy it, might as well go all the way and buy the best no?