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?
Many ask themselves this question, but what kind of question they will ask themselves when it again drops to 3k. So it is impossible to maintain constant growth, there will be a drop only the level of these falls will affect the overall market in different ways.