I don't think it takes old coins to make NFT because NFT is only for Games, music and art
and it can be said that NFT only focuses on projects dealing with artwork
it is true that what you say should indeed be done, but maybe there are still many people who want to find solutions or you could say looking for profit with new things. although it may be accepted or not, it all depends later. but trying is one option that can not be denied and allowed.
NFT itself is also still too new and it is difficult to sort out what can be accommodated for NFT, because if games still make sense and can continue to be used. but the question is if art is digitalized, can it be accepted by many people, who actually want art to be displayed and seen at any time with the naked eye.
let NFT continue to grow and of course everyone can take advantage of the opportunities that exist and it's just a matter of whether the market will accept it or not, because everything will be returned to the market.