The thing that makes the bitcoin dangerous is because the price is very volatile, in this world there is no investment like bitcoin and bitcoin investment such as ride roller coaster, the first thing we have to prepare is we must be ready to lose if investing into bitcoin.
The price is already volatile even before bitcoin gets popular, we have to know that it is its basic nature but still people
are patronizing the use of bitcoin that is why it created a demand which makes the price to increase now.