Why will most play to earn NFT games will fail?

A new era of crypto currency and NFT's has begun and is taking over the market. Many game developers have started moving their games to blockchain. There are several successful games like decentraland , sandbox. The crypto tokens of their games are an upward sloping curve whereas other games like gods unchained and thetan arena are a complete failure in terms of their tokenomics.
Their token curves are constantly downward sloping. There is only one reason behind this and that is demand and supply of tokens. Most of these games create a high amount of supply but fail to create a demand. Successful games like sandbox, axie infinity and decentraland take a close look to their demand and supply, hence they create a supply with respect to their demand but on the other hand downward slopping games set their games where people can earn their tokens. Most people sell those tokens and convert them to money also their marketplaces contain other other currency for buying and selling which does not create a demand for their currency. Rather using their own native currency in marketplaces and in game purchases can create a demand.
Hence creating a demand can help token to take a upward slope.