It is possible to cross more than $20k but how long it is going to take nobody don't know because the market situation and from the news makes the piece of bitcoin more stable. It is a very good sign for bitcoin to hold them as long as possible to increase the price.
Future is hidden and human being knows nothing about the future price. We know that price depends upon the investment capital and demand. If more and more people invest in bitcoin the price will automatically rise, but if there is no or very little demand the price will never increase. Hope it will reach to $20000 again and may cross this level in the future.