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..
In my own opinion, trading is just the same as gambling with lower risk and people can always earn profit if they can hold their coins until the price grows up and not just immediately sell when the prices are dropping in the market.