Check the way coins behave in terms of price on coinmarketcap, for example. You'll see some of the tendencies. It's rue, that when prices are down a good investment can make difference, but make sure not invest (trade with) money you can't afford to comfortably lose. I'm following closely WAVES and ZILLIQA now, have not bought yet, but keeping an eye on them. You can keep your ETH as well, it's a good investment.