Good way to start while not starting anything. You can start just by analyzing the price charts as a basic understanding of previous incidents in the market which led to rise and fall of bitcoin. Then you can learn about the market indicators and how you can use them for your analysis and projecting the future trend. You wont have to buy sell coins immediately but you can try doing some dummy trading on paper for practice.

There may be many reasons to do so. Maybe they just ran out of cash at hand to buy in even at low price. Its not something new and happens with margin traders often ending up in them having to take out a loan.