NFT are popular because it allows making money. A lot of people want to make money while they are playing different games.
Early people spent their time and money playing games. Now the situation has changed. Gamers can earn money because they are playing games.
NFT is popular now but nobody knows how long such a trend will last. For gamers and users of NFT the most important fact is that the price of NFT continues to rise and many people want to make money on such rising trend.