It is very difficult for one to become successful in trading crypto currency if you a good knowledge and experience if what trading in all about. It is always advisable to have a good knowledge of technical analysis particularly with the use of candle stick in my opinion as that work for me and that of fundermental analysis since it usually affects technical decision.
Many of them have good knowledge of it actually before getting into trading but what destroys them is purely Greed.
Greed is what makes them blind to when to leave the market, out of greed many of them invest with little money, and want to perform the magic of multiplying it immediately without compounding, how on earth will a trader invest with $100 and expect to make $2500 in return immediately, because there is a magic trading tool called margin trading or leveraging. Ask many failed traders, they will tell you how much they leverage with expecting the market to be so volatile for them to turn small capital into immediate fortune.