In my opinion the ETH price in 2020 will probably be very high. Because at that time i thought Bitcoin could be a worthless currency at all $ 100,000. We can not know before. But Bitcoin can do wonders and magic. ETH will therefore benefit greatly from Bitcoin.
I wish it could happen but I have too many doubts. Such great changes need more time. Both Bitcoin and Ethereum will gain greatly but in 3-4 years not earlier - simply wait.