Here is a video of a guy who bought Toyota Prius back in 2013 with 1000 BTC. If you could have waited for a bit, specially in 2017, we could have been a Lambo. Although in the video you will see the Prius side by side with his Lambo so I think this guy really did make a lot of money in bitcoin in 2017 as well. He also talk about the lessons he learn from investing in bitcoin.
He made a conscious decision to sell his coins to purchase a car and he will not sell those at that time if he was not on profit in the first place, there is nothing for him to cry about at a later stage as everyone had an idea that the price will increase from those situation in ten years time, that is the case with the first ever deal for a pizza too, considering that it will be the most expensive items ever purchased in the world if you compare it to the all time high valuation. 