There will always be a risk in any investment you make. The time you bought Bitcoin or you hold your Bitcoin is considered as an investment already and has a risk because the price is unstable and price might drop or goes up. We can't compute how much is the risk but i am only sure that there is always a risk everytime you are holding Bitcoin or any crypto currency.
Risk will always be there, in everything, its up to you on how do you manage it or how do you want to take care of it. People always be afraid on taking a risk. We should be brave on taking a risk always because if we passed that challenge we will be better and we will be reach. Sometimes we lose sometimes we earn a lot in investing whag matters most is we have learn from it.