It looked like the cryptocurrency №1 would keep on doing well. As far back as only December 17th bitcoin rate set an all-time record having reached $20 thousand. However today, on December 22nd, bitcoin rate has suddenly decreased by almost 36％. So currently it is enough to have as much as $13 thousand to purchase a coin. It is thought that such a collapse was caused by a recent bankruptcy of South Korean cryptocurrency exchange Youbit that was closed because of cyber attacks.
Computer fraudsters managed to hack into Youbit and steal 17% of all assets kept there.