No matter how promising an altcoins can be , bear in mind that the owners has his own reason for creating them which might not be made known on the white paper. If it is not bitcoins , stay away from shit coins with hundreds of empty promises.
You are kind of confusing altcoins and shit coins. There are some altcoins that are promising and have risen from their beginning to their current price. Take sol, Eth or BnB. They have performed very well and are also known as altcoins. Even dogecoin that was seen as shitcoin in the past have also been steady in creating trading volume. So there are altcoins and there are shit coins. You can invest in altcoins especially the three I mentioned and you get your investment return unlike shit coins that will only be hyped and afterwards they are gone.