Altcoins can be profitable, but they come with higher risk compared to established cryptocurrencies. Research thoroughly before investing. This is not a financial advice.
You already know the answer to this, so you should also understand what you have to do when you want to invest in crypto. Yes, of course if you want to invest in altcoins, you need to analyze the alctoins very carefully. Because, the risk is much higher compared to Bitcoin.
Anyway, don't believe the sweet promises from many parties regarding their altcoins which are promised to skyrocket and become superior in the future. Promises are usually just promises.