For the first time, when I move to cryptocurrency world (March 2016) the btc price were around $400... it was risen up to $17000 few days ago... 17000/400 x 100 = it's 4520% growth in 21 months.
There's a popular statement such as, the thing what it is existing next to the risk is the success.
Should I believe it and do what I didn't do 21 months ago?
Bitcoin really had a great year 2017 because the price went from about $952 in the early January reaching up to $20,000 in the min-December within the same year. Bitcoin gained over 2000% increase in value in 2017 making it the successful year for bitcoin ever. And 2018 is about to be a great again.