> I guess you could argue that NFTs isn't the main aspect of cryptocurrencies
Not even a major aspect. Just like neither are the main aspect(s) of Web3.
Despite what con artists and puppet farms on Reddit and Twitter are pushing.
(The web3 moniker in its current form came years before the first NFT contract)
I guess you could argue that NFTs isn't the main aspect of cryptocurrencies, and I think you'd be right, but I find cryptocurrency projects in general seem to lean heavily into the scarcity aspect, and promise that early adopters will be able to cash in that scarcity later.