Bitcoin remains a cryptocurrency, and it's undeniable. Bitcoin is the mother of all coins, making it difficult to compare it to altcoins. Bitcoin remains the king of cryptocurrencies. This is why it's crucial for both beginners and those investing in Bitcoin to have basic knowledge of crypto so they can easily distinguish valuable coins from duds.
Can we just remove generalizing bitcoin with other shitcoins and call it cryptocurrency? saying that bitcoins is a cryptocurrency sounds to me like you are classifying bitcoins alongside shitcoins. The market capitalization of bitcoin alone is higher than all the whole cryptocurrencies put together so bitcoin deserves great respect.
Never invest in Bitcoin without a clear understanding. At least understand the basics of crypto and security. Although Bitcoin is the best asset for the long term, investing without understanding what you're investing in is extremely risky, and you can't even differentiate between Bitcoin and altcoins. Therefore, it's crucial to have knowledge before investing in Bitcoin. When you have a solid understanding, you'll invest in Bitcoin without hesitation.
You don't need any clear understanding before you start to invest in bitcoin, just invest by buying with your discretionary income, any knowledge you want to know will come along while you are investing. Every investment is a risk but bitcoin have proven to us over the years that it has long term sustainability but it's still good to evaluate possible risks that might come when investing so that it will enable you to make proper preparation in case a sudden change occurs.