You need to create customers and wide appeal first. Cryptopunks were free at the start, so were cryptokitties. Lootproject just launched and anyone could mint a free loot bag and the floor is now 10 ETH. Beeple NFTs were dirt cheap. Pixel portraits were dirt cheap. Maybe you set your price too high and didnt do a good job of marketing? Learn about the space before you try to make a quick cash grab?