You're right about that. The term "cryptocurrency" means cryptographic currency. Bitcoin was created in the first place as an alternative "currency" during 2008's financial crisis. It was stable before it began trading across exchanges. Back then, people used to pay in Bitcoins without caring about how much it was worth in USD (Fiat). Things have changed and now people rely on Bitcoin as a speculative asset for profiteering.
Based on how people use Bitcoin today, we can say Bitcoin is a multi-purpose financial system. It can be used as both an asset or a currency depending on government regulations and people's daily needs. What matters is not how Bitcoin is used, but rather if it works as intended. As long as Bitcoin remains decentralized and censorship-resistant, there should be nothing to worry about. Just my thoughts