It would be better if you refer to bitcoin as bitcoin because if you refer to bitcoin as cryptocurrency, you might mislead newbies to believe bitcoin is the same as altcoins or shitcoins and they might invest their money into altcoins or shitcoins, thinking they are investing in bitcoin. So for newbies to avoid such a mistake in their early stage, always refer to bitcoin as bitcoin so that they will know bitcoin is different from cryptocurrency. Don't be deceived; Bitcoin is absolutely different from cryptocurrency, and there's nothing like Bitcoin. And even though Bitcoin isn't the first decentralised digital asset or currency, it would still outperform cryptocurrencies because Bitcoin allows you to send money to anyone in the world without trusting a middleman.
You are totally right. Newbies need to know between Bitcoin and cryptocurrency. We can call any digital currency out there to be a cryptocurrency and by how they perform, they are literally not match to Bitcoin. Bitcoin does wonders, while some so called cryptocurrencies make the digital currency system sucks. Many projects are rug pull, scams, pump and dump, in general we called them shitcoins. And this have made many lose interest in Bitcoin too, tagging them to be all the same. This is the main reason why Bitcoin should not be categorized under cryptocurrency. Bitcoin is Bitcoin so let that sink in.
I don't understand what you mean by newbies need to know the difference between bitcoin and cryptocurrency, you're making it seem like bitcoin is not a cryptocurrency whereas it is, regardless of what you think or how any newbie wants to feel it won't change the fact that bitcoin falls under the category of a cryptocurrency infact all digital currencies are cryptocurrencies.
You've already contradict yourself by saying we can refer to all digital currencies as cryptocurrency then you're saying bitcoin is not a cryptocurrency, how is it not when bitcoin is said to be a digital currency? Bitcoin is the first cryptocurrency, no other cryptocurrencies can match bitcoin, it supercedes all, those are very correct but newbies should understand that Bitcoin still fall under the category of a cryptocurrency.
Using the term cryptocurrency might be some kind of confusing since there are many other coin untrustworthy coin in cryptocurrency that's why it's be emphasis to use the term Bitcoin since the topic we are discussing is regarding to Bitcoin so using cryptocurrency is like taking us to a different topic which can be seen as off topic so instead of using cryptocurrency you are either say shitcoins or Bitcoin depending on the one you want to talk about so I don't see what is there that you can't understand.