Um.......if I buy a 2 mil Gil item, the 2 mil Gil that I have is now represented by that item, its just that my 2 mil in gil is no longer liquid. If I decide to sell that item once I'm done using it, barring huge inflation/deflation, I can get my 2 mil Gil back. If I try to meld that item and it blows up, that item no longer exists. My 2 mil Gil worth of participation in the economy no longer exists.