What is “crypto”? If you hold the keys to some PoS token it’s effectively the same as holding physical fiat dollars. There is crypto and there is Bitcoin, and they are not the same thing.
Bitcoin is a cryptocurrency. It was the first one and it spawned many offspring. Some are identical, some are chain forks, some code forks. Some change, add or remove features. It created the category “cryptocurrency” and shares all of its features with other cryptocurrencies.
This “buh buh buh Bitcoin isn’t a crypto!” meme that’s popped up since the last major crash is childish.