Hacked Tokyo cryptocurrency exchange to repay owners $425 million

Tokyo-based cryptocurrency exchange Coincheck Inc said on Sunday it would return about 46.3 billion yen ($425 million) of the virtual money it lost to hackers two days ago in one of the biggest-ever thefts of digital money. Coincheck said in a statement it would repay the roughly 260,000 owners of NEM coins in Japanese yen, though it was still working on timing and method. The theft underscores security and regulatory concerns about bitcoin and other virtual currencies even as a global boom in them shows little signs of fizzling.