My guess is that it's a really tough job to predict what's gonna be Bitcoin value in 2020 but if it goes high then it's really good for us. Until then we will have two halving,and muck power mining for mining fewer bitcoin. I guess Bitcoin in 2020 will be more stable and more popularized because more people will use it and more great marketplaces will use as well as payment processor, also it's price will increase during this period IMHO.