I don't think so.
I'll use my BTC to borrow the $.
Borrow twice the amount needed. Half for the Tesla, half to buy some more BTC.
6 months the BTC will double or more.
You just got a Tesla for free!
Don't have to do that because Tesla said that the bitcoin purchase isn't going to be converted into fiat which means that the Tesla cars that are going to be sold in that manner has a fixed bitcoin price but I do agree that waiting for the 100k USD is a bit of an attractive thing to not spend my bitcoin but if I were to have the bitcoin and the opportunity to buy a Tesla car, I think that I will be buying it.