Success from trading happens with most of the people, but it is very rare to experience by the very first time if the user hasn't known much about trading. With trading predictions needs to coincide, only then buying and selling of bitcoin gets executed within time. Here Op has invested at the right time, and if he/she has kept hold for a little longer time period the profit could've got doubled. This will be achieved by the professional traders as well traders who continue the process of buying and selling even on small marginal profit unlike the market moves.
Actually it's hard to gain success in trading if you don't have enough knowledge,analytical mind and good intuition. I also think that it's quite hard to have positive gains in your first trade. But maybe she's just lucky or has really good understanding how the markets work.