You can gain more money on altcoins, for sure, but you can lose money quickly too
You have to be careful about buying any altcoin, if you really want to buy alts, it's better to do a lot of research because there are a lot of devs who only want to sell everything and exit the coin
With time, I learned to trust more in BTC and only in a few alts
I only chose bitcoin which is able to enter the top 10 on the CMC site. that's what makes me confident in my investment. Thank you for giving an opinion about the risks of holding altcoin.