First of all everything in this world is a risky gamble..every kind of investment are risky too ...but ofcourse for you to be able to manage risk in every investment especially in crypto currency you have to every little thin in it up to the biggest once ..how is it work.is it scam or not..and most importantly dont ever ever trust to anyone that says to you give them money and they can doouble it...so all you need to have are awareness and commonsense..
The good thing about investing is that you are the one that decides in what you want to take a risk and when you want to take that risk, and that is a huge advantage, for example I am not a very good trader or anything but I knew that I was not going to invest in bitcoin at the end of the year when the price was so high and it was skyrocketing so fast, so I avoided bitcoin at that point in time and it paid off I didn't lose money, but investing in bitcoins right now will be a good option.