I have prepared a table that I added here below, which contains the statistics of the bitcoin value growth in percentage during the last 3 years : 2015, 2016 and finally 2017. We can clearly see that the bitcoin's value has achieved an exceptional growth this year, knowing that the value is multplied in 4 in 6 months. So, in your opinion how much will be the  growth in percentage during 2018 ?