At this bearish and unstable period, there are several altcoins that can be traded.
All that is required is that you make your own comprehensive research and figure out whats best for your portfolio
Etherum can be unstable, but so is every alt coins.
Have a deep research on iota, xlm and stellar.
Yeah, it is true. Stellar also is a good choice to buy. I guess it has a promising future yet it develop with a positive progress currently. But talking about ETH, I am sure it is still the best option for investment. No crypto coins with fixed and stable price, it is a nature of cryptocurrencies.