The price of Bitcoin almost $13000 now and ETH $330,actually most of people investing in BTC and not focusing on other coin when BTC will reach little high more than people will buy other coin and price of ETH will be increase more when people will buy ETH.
Yes ETH has been a bit slow but if you check the rise in the value of ETH from January 2019 till now, you would see that there is a big surge in the value of ETH from May to June and this is the evidence of future rise as well. The restriction value for ETH right now is $355 and I think once ETH crosses the value, there would be a skyrocket speed of the coin.