There are several altcoins that are showing promise. If you have enough capital, I would suggest you spread your investment and putting a large percentage of your money in Ethereum. It is low risk and may be low reward but hey, the idea is not to lose your capital. The next altcoin to put money on is SOL. It's gaining momentum right now and projections show it may break its all time high. For me, SOL is medium risk, medium rewards. Then if you have money left to throw away, you can invest in some memes.