I believe BTC will reach $20K, even $1M, but that won't be in 2020.
BTC price is currently holding above $15K but the uptrend is slowing down, and negative signals from the whale's unusual activity are hurting market sentiment. In that case the price of BTC will not grow as impressively as the past six months. $15K is too good price for BTC in 2020, I had only dared to predict $10K before.