Altcoins can be profitable, but they come with higher risk compared to established cryptocurrencies. Research thoroughly before investing. This is not a financial advice.
really ? you created a thread and posted a sentence that had been said thousands of times before? and really not a Financial advise 
Altcoin is a good investment if you knew what kind of altcoin you are dealing , so better to learn and earn but be aware of the risk.
altcoin is not as safe as how bitcoin will bring you.