I think it depends on bitcoin destiny. If bitcoin hard fork will success then ethereum will lost his price a lot. Because now ethereum price grows up so fast because of fear before bitcoin hard fork of some investors. My price is between 1,500-3,000$. When bitcoin price should be not less then 10,000$. I am very optimistic 
Some says bitcoin prices might goes up to 100.000 dollars. So are you sure that you're optimistic?
In 5 years, we'll be talking about the year, 2022, where bitcoin block halving will have taken place 2 years ago. We'll observe huge price movements.
cmon $100000 for 1 BTC?!?
I don´t believe there is such a huge market.
Ethereum in 2020 I could imagine around $1000.
As large as ETH could get with it already being priced over $200, I would think there are already a few ICOs that are better worth the investment.
Of course there are better things to put your money into - find a low market cap coin or new ipo that looks promising. But people have to buy the former to buy the latter. Wait for the shitcoin to pump then you have gained more btc or eth.