I'm just curious when can I start buying my dream cars with altcoins, I mean can huge automobile companies like Toyota, Ford and Nissan start accepting cryptocurrency as means of exchange
Yes, it will be possible when they will decide to create their own crypto and list it in the crypto market. However, cryptocurrency for business or established company may not work for the value of the coin may change from time to time so probably they will be having some problems with the amount needed to pay for a certain car you will going to purchase.