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?
Yes, cryptocurrency is full of mystery. This was happened because the volatility of crypto.
Sometime you may see that the price is not only spiking, but they can dropping with full speed too, just like today,
bitcoin price was decreased from $7600 o $7200 on the same day.