Earnings on crypto currency is a risk. In order to minimize the risk, one needs to be very good at navigating the crypto-currency market, knowing a lot and constantly following the news.
There is a risk attached with every kind of work which you are planning to do and that the probability of the risk greatly increases at time when you are thinking of investing of the money and that too at a place which has not been so long and that it is still in its early stages of the development. The only possible way of survival is to get as much knowledge as you can and then you have to make proper use of that knowledge.
That is very normal in trading, you have chances of making but the risk of losing your own investment is also there, it is depending on some factors, for example your experience, skill, and the most important is your luck. If you are lucky in trading then n o one can stop you from making money in trading.