Lopp calculated the seven-year trend of Bitcoin price based on daily value change. With the exception of 2014, which was affected by the downfall of now-defunct Mt. Gox, Bitcoin has continuously recorded positive daily value change since 2010.
Bitcoin average DAILY value change:
2010: +0.82%
2011: +0.76%
2012: +0.26%
2013: +1.11%
2014: -0.25%
2015: +0.09%
2016: +0.22%
2017: +0.66%
https://cointelegraph.com/news/bitcoin-price-will-hit-250000-by-2020-if-seven-year-trend-continues
I don’t expect this growth to continue at the same rate. There will be corrections and maybe some big ones. There could be a leveling off period as well. We have to take into account bad news such as government regulations or hacked exchanges that will affect the price. Also the Bitcoin transaction fees could go higher which could cause the value to drop. I expect the price to increase, but not at an exponential rate.