Asking the few people who has BTC to spare and buy a Tesla.
sourceNothing wrong with spending it I guess but let him buy more from the market. He and his company got plenty of fiat to convert to BTC anyway.
For sure bitcoin is a better investment than a Tesla but I guess there is no problem if you have a bitcoin that you want to spend on since bitcoin was a digital currency and it was made as a currency to buy something if you can afford it you could buy it.
People just go for investment because it was just better for investment at this moment and not really as a currency that you could spend but there is nothing wrong if you want to spend it the only point is you gonna lose your profit when suddenly bitcoin increases its price for example up to a 100k$.
In my opinion, it would make sense just to use fiat than bitcoin in buying this tesla
to avoid regrets in the end when bitcoin is on the moon again.