This has been my concern here in my own country Nigeria. No auto dealers or automakers has ever accepted any crypto particularly BTC for purchase payments
Well in some developed countries, where technology is really advancing and always embressed, wholeheartedly, You can purchase a car and pay with Bitcoin. Some Car producing companies in US, Dallas, Kasas etc. announced their acceptance of Bitcoin for car purchase.
Almost anything can be purchased with Bitcoin nowadays, and Car purchase is not exempted.
Check this news out;
A car dealership in suburban Albany is accepting bitcoin purchases.
Michael Severance, of Michael's Auto Plaza, tells WTEN-TV the dealership recently started accepting the digital currency. Severance says he became interested in bitcoin as its value rose. The East Greenbush businessman says he wanted his dealership to take advantage of an opportunity.
Probably, if you make more enquiries on how to purchase a car with Bitcoin in Nigeria, you'll come across some-day. It's just that the confidence of transacting with Bitcoin is not as grown as some more developed society.