ETH specifically is a good investment right now. Hitting ATH after ATH and setting new highs for us. Getting real close to 2k per coin. You dont want to miss the pump.
If hitting ATH after ATH makes something a good investment, then almost every coin on the market now is a good buy;) Just remember the craziness of 2017 and don't make the same mistake.
Not saying ETH is a bad buy at all, I actually think BTC and ETH can't go wrong long term, but you never can truly say they're good investments just on account of ATH targets.