Here I found a wonderful YouTube video where the author have literally downloaded all the NFT'S in existence and also he actually explains what are NFT and how they work in great detail. However this doesn't mean that the market will crash n all, it still holds true that all the NFT's can't be copied or forged because of the fact that they are already registered on the blockchain in the wallets of their respective owners.
https://youtu.be/i_VsgT5gfMc