You own all of it, but I assume you bought them over the months/years you've had your account. Nothing wrong with that as long as it doesn't hurt you financially then there's nothing wrong with spending a good amount of money on something you like.
I think somewhere in epic games settings , it says how many money have you spent in epic games .Plz show us .We have the same age and i have spent 580 😅I m really curious to see your