NFTs are not cryptocurrencies, but I assume the parent comment was also calling them a scam? (well, they didn't use the word scam, but it looks implied)
There are also other "solutions" on top of blockchains, but I keep reading about them only from people who have a vested interest in getting more people to take part, in order to increase their own net worth. Which sounds like a pyramid scheme to me.
But to kinda contradict myself: Yes, there are blockchain things that are not pyramid schemes or other scams. But they also don't provide any other value. Whether they are scams or not depends on if you think the people pushing it actually believe in what they're saying.