I don't understand the point you are making.. you bought Bitcoin when 10000 bought a pizza so roughly 500 Bitcoin for $1. congrats..half your luck.
what does that have to do with anyone c considering buying 1 or a a portion of 1 for $10000 ?
the % increase has already been astronomical as everybody knows..no new info there. what price it may be in 1, 2, 50 years is all a matter of opinion ofc.
if you are interested in selling 500 Bitcoin for $1 awesome otherwise what is the point in repeating how cheap they once were and what you brought them for?