It is good decision to buy valuable coins during bearish market and hold those for long term. Thus it is possible to make earn a lot from those coins cause while bullish market come, those will raise up continuously. But if you buy others so called altcoin then that will risk your investment. Cause those might give you a lot of money but there is also chance to go down and Won't pump even during in bullish market
Correct me if I'm wrong but my impression with your reply is maybe you mean to say meme coin or those assets that are only use for pump and dump.
All are alt projects after Bitcoin, those well established assets are also considered as alt coins and there are many that you can pick to use for your investment. Just do your diligence to research and investigate for possible great compensations.