well, the "concept of bitcoin" which you claim to like is not about some virtual thing that you buy, hold and make (fiat) profit!
this concept is about having a "currency" that works globally without a boarder or middle man, so it can not be controlled, censored, closed down, confiscated,... so if you really understood this concept and liked it then you already know that it is never late to start using the unique decentralized currency of the world.