Last year, Bitcoin started at $3,531 by August 11, 2017 to $19,248 in December 17, 2017. That's 445% growth in just 4 months. Last August 11, 2018, Bitcoin is being traded at $6,194 USD and it will only need 222% growth to hit $20,000 by December 2018. That is just half of 445% growth last 2017. So if question is to hit $20,000 by December 2018, it's very much possible.
Last year we had a big hope about crypto pumps, everyone was waiting for something big and that happened. But this year, at this moment, most of the people are in the panic, they are waiting for the market recovers to sell their holding coins. Last year people held their coin to make big things. So, I think there has a different!