It is a good way to make money in these days and now further bitcoin is traded on world exchanges all over the world so beside the price movements we should also use this for payments and most of all it is used by speculators to get benefit in short term.
Bitcoin is growing very fast, even in December 2017 the price reached almost US $ 20,000. Everyone was surprised by the development of bitcoin prices, finally many speculated to invest their money in bitcoin. But then the price dropped which made people panic and sell bitcoin with losses, fearing prices will go down again. Business is risky, but mentality and analysis remain a consideration in investing, especially bitcoin.