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 yourself have answered it, investing in altcoins is indeed profitable, but there are many factors that must be considered and you must also have the ability to analyze and also carry out thorough research on the altcoins you are going to invest in, especially new altcoins.
And I think nothing is better and profitable than Bitcoin, and it would be better if you do both and prioritize Bitcoin. Because if you experience losses from altcoins, you will gain profits from Bitcoin, especially in the long term.