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NFT existed since cryptokitties like 2 to 3 years ago and yet they reached the peeked total trading volume this year and catching so much attention because of P2E earn mechanics. I think anything new in cryptocurrency that people gets a profit in exchange of using it will gonna be the next trend. Its hard to predict the exact type but we can have a hint when someone introduce fresh idea with a very cool reward system.
The NFT started creating noise recently even though it is here for the past few years and it is just developing. Earlier i was not interested and did not think about collecting digital art but now things are changing and there are authentic arts and real arts provided through the blockchain and it will make a huge difference in which rare collections are held.
May be we will see some polished products in DeFi and NFT in the next 4 years.