If I have 10 BTC I buy a car

5800$ car... dunno...
better ant miners or hype invest

$5800 ? Lol do you want to buy the car? you will get is a car wreck and will be broken in a few months? you can search the car at that price on ebay. lol very unfortunate amount of money just to buy a car wreck. better to use more useful which eg buy mining equipment. it will be much profitable