Hack of cryptocurrency exchange in South Korea became another shock for holders of digital currency, that resulted in selloff valued at $42 billion, Bloomberg reports. As a result bitcoin fell more than 50% this year.

Recent hack interrupted a two-week stillness that was observed on the market and resulted in rise of concerns about safety of digital currencies that were lightly regulated so far.

Bitcoin lost 11% and is trading on Monday morning at $6781,19. It means that the larges cryptocurrency dropped by 53% from the beginning of this year. Most other virtual money declined as well. As a result, the market value of all digital assets reduced to two-month low of $294 billion. Value of the market in January, when a cryptomania peak was observed, was $830 billion.

Enthusiasm in regards to digital money was lost after a whole row of cyber attacks, including $500 million theft from Japanese exchange Coincheck Inc. at the end of January. While the last theft from South Korean exchange named Coinrail was much smaller, it caused wave of selloffs from investors.

There are more than 50 cryptocurrencies trading on Coinrail and it is included into Top 100 most active exchanges in the world. Trading volumes reach $2,65 million in 24 hours.