Put simply - because the market is not hugely over-inflated at this point by an abundance of uneducated investment. What goes up, must come down and this year boy did it come down.
I believe you mean last year 2018. Yes, the market was crazy because the rush to make wealth through bitcoin was pushed by uneducated investment. Now I believe a lot of losers have learn their lessons and are closely waiting for the right time. I know the market will push up this 2019 after the so many programs and regulations in cryptocurrency are executed.
There are three ETH Hard Fork lined up this year which may create a huge difference.
1. Classic Vision Hard Fork
2. Ethereum Nowa Hard Fork
3. Constantinople Ethereum Hard Fork (Major one)
The first two are rumoured to be scams. Be careful around them and do not expose your private keys to any site in attempting to claim the coins.