If you invest in bitcoin, you are really risking your money which you cannot know if the price will increase or decrease. So it's better to research so you will know when to invest.
Well without risk, you are nothing. Every single element of this world related to money must have risk associated with it. Nobody can get a bed of roses until he jumps over this risk plane. Successful people never afraid from risk, rather they use it as source of motivation and a challenge. Mostly this challenge ends in a beautiful way. So,whats bad in it then.