Now came the time of NFT. NFT is a morden trend and NFT allows to earn even more money then other altcoins.
Now appear project like this
https://twitter.com/LaCucina_DeFi/status/1466776061493059584 that allow to combine NFT with DeFi to allow people to earn even more money.
New technologies offer new opportunities.
Many people use cryptocurrency for investment purposes, they buy a cryptocurrency and hold it, creating demand in it.
The more people trust cryptocurrency and buy it the more demand for digital assets.
I think that the most popular cryptocurrency is Bitcoin. Many people use Bitcoin for investment purposes because Bitcoin has a limited issue.
Many people buy Bitcoin hoping for the future growth of its price.