And there is a third group... people who want to collect something... like stamps, coins... and todays generation has discovered NFTs. If you check opensea.io (largest marketplace for NFTs) you will find out, that most people are buying and collecting these items.
And this third group is by far the largest

NFT is basically sign that you're owner of specific content. I seriously doubt it's biggest group when cryptocurrency marketcap is very small compared with other investment and it's very easy to pirate the NFT. Some people even decide to pirate almost all NFT[1].