I buy the cheapest car which is in working order, keep it for 5 years, then scrap it when it won't go. This means nobody steals it, I pay virtually nothing in depreciation (especially as the scrap value is often a third of the original purchase price, and I can often take parts out of it to sell first). My current car doesn't even lock. Nobody has ever stolen anything out of it, despite leaving satnav, mobile phone, and several tools in the back.
Don't get me started on electric cars, they just aren't worth the expense. If you can charge them for free (certain government run car parks, but how long will that last?), you can save money, but you still have a huge initial outlay.