I think the ETF decision thing will drag until Q1 2019, it turns out they can keep postponing the decision until Feb., 2019. If ETF is accepted we could see $50k Bitcoin then. 
well, we can speculate as high as possible about the price of bitcoin, but don't be disappointed with the results later, even when ETFs have received bitcoin, that won't guarantee the price of bitcoin reaches the price of $ 50k for this year.