I think you misunderstood. Based on the wording it would seem that Tesla gets to choose how to refund you. So if BTC goes up your refund will be the dollar valu

I think you misunderstood. Based on the wording it would seem that Tesla gets to choose how to refund you. So if BTC goes up your refund will be the dollar value of the car, if it goes down you'll get BTC back.