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 The only problem that the term cryptocurrency was used at least since 1998 (Wei Dai's b-money paper). And people use crypto just as a short for cryptocurrency. 

So the category was invented way before, it included the predecessors to Bitcoin and Bitcoin itself, way before other coins joined. 

Your analogy is this completely wrong.  
 Ecash cashu or GNU taler are cryptocurrency? Are they more similar to precedent attempts to do electronic cash based on cryptography than what today is called cryptocurrency. But no, ask to chatgpt, by definition a cryptocurrency is express in function of bitcoin as a sort of clone of it that needs to have a "blockchain" and all the famcy stuffs. But not achieving what of bitcoin achieves. So they have the form of the planes, the wings and the fancy stuffs but they dont fly. But the name "wingableshelics" was used prior the inventions of the planes, from an ancient tribe to abstractly refer to prototipe of planes that actually somethimes was even able to fly for some meters.