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.
Come on dude! 100K for a limitless currency? Thats almost impossible. If you invest all money on earth on ETH right now, 100K is still a dream. Lets be realistic.
My guess is somewhere between 2K-4K Usd.