Besides even if in the future we could convert one BTC in a lambo should this be done? After all even luxury cars lose some of their value after they have been used while bitcoin goes up in value the longer you hold it, so it seems like a bad business decision to get rid of something like bitcoin for something that is just a frivolous purchase, now if you have a lot of money then you could afford it without spending all your bitcoin, but still I think there are other ways to spend our money and get more enjoyment out of it.
If you are so into investment and wants to maximize the profit in 7-10 years, those money you want to buy for luxury or to spend it for leisure, you can actually use that money to buy more fractions of Bitcoin regardless of the current price, that'll be worth way more than the current price in 7-10 years. That actually sounds like an early retirement plan right?
Lambo, mansion, and all other luxuries isn't important anyway, retiring early and enjoy life would be much more important.
That is exactly the way I think, while I can understand the appeal of a life full of luxuries like that, the problem is such a life is too expensive and very few can afford to live like that, however retiring early and enjoy a high enough standard of living can be achieved by working hard, investing in bitcoin and holding for a decade, that is my goal, and I am sure that if I keep holding my bitcoin in the future I am going to be able to get to that goal and have a very comfortable life ahead of me.