Yes it depends on you, if you want to sell your car to buy bitcoin or invest in bitcoin. That is a good action for the future, because bitcoin is a long-term investment tool. But if you want to quickly take advantage, I suggest not to invest in bitcoin. 
This is good primarily because the car is a liability, and bitcoin is an asset. Convert liabilities into assets is a good, but risky idea.
indeed for all investments there is always a risk, but if you don't want to face the worst possible risks, then you will not be able to get an experience, because investing in crypto bitcoin is a good decision right now
Well i'd say this isn't a very good idea if you ask me but i'd imagine those people who took a risk with their properties at the start of 2017. They'd probably tell you it will be all worth it. But then again, your car, your call.