I can be sure that the Bitcoin exchange rate will rise again to $ 20000 in 2018 or maybe even more. Because after 3 months of declining in exchange rates beginning in 2018, the market is currently on the upward trend, and the Bitcoin exchange rate has risen more than $ 3,000 in April 2018. It is expected that BTC rates will bump in Q3 and Q4 in 2018.
More time is enough for this to take place, $20,000 was seen before so it will be seen once again, no questions about it. We all know it will try this price very soon with a pump wave.