Yes, there have been thousands of failed, scam and useless altcoins but I don't think we should avoid all altcoins. I have no objection to someone investing only in bitcoin because it is the safest currency on the market. But let me ask, if we only talk about profits, what about altcoins like ETH, Link, Near, Solana...? If I remember correctly, ETH was created in 2013 and it is still growing bigger every day until now, the initial investors in it are making huge profits. Similarly, solana was expected to die when FTX collapsed but look at what it has done over the past year from $13 and it is trading above $140.
Yeah Altcoins has huge potentials really I am personally into Altcoins right now because I can buy some of them with my smaller funds but my plan is that all my profits in Altcoins will surely be converted to Bitcoin. I can't buy some Bitcoins with my small fiat money but I can do that on Altcoins I am into quantity right now because I can't do that with Bitcoin.