No, bitcoin is not dangerous to the people and in all aspects. In fact the company of bitcoin issued his coin to promote common good and make some changes in terms of currency in our market.
They help each of everyone to have a better life where they no need to work hard for it.
I think bitcoin is dangerous, its price is volatile and it is also affected by many social factors.
It is dangerous if you don't know how to get used to the volatility because if you are used to the volatility of bitcoin then there is nothing to worry about. You can also lessen being dangerous of bitcoin if you will study how to do technical analysis because that is how you can spot the best buy and sell or entry and exit point in bitcoin market.