Has anyone heard of this on any DNM? I mean, how hard would it be to make those tiny holographic stickers for yugioh cards? Or get the same kind of paper material as these cards have so they could pass the bend test? Some of these cards are worth 100s of dollars and can be easily sold on ebay, in card stores, to people without them noticing or caring. Discuss
One flaw in your plan - if someone does get in on this then chances are that the market will be flooded with them, people will soon question if they're genuine and the price will soon fall so profit will fall. Nice idea but I'm not sure it'll be that successful.