The best altcoin for investing in the cryptocurrency market is still Ethereum.
It is this coin that can lead you to good returns in the long run if you invest in it.
In case of market decline, you can save money.
Eth has grown x4000 (From 0,30$ to 1200$). Now, in order for the ethereum to grow x100, it must cost 13000$ - this is too long. There are many other cheap and promising altcoins that are cheap now. And the task is to find such altcoins.