Bitcoin - not as safe as you might think

South Korea's Bithumb said on Wednesday that serious flaws had left the crypto exchange's internal ‌system susceptible to potential sabotage and failed to prevent an erroneous ‌transfer of more than $40 billion in assets last week.
The country's second-largest virtual asset exchange said ​it accidentally gave away about 620,000 bitcoin (BTC-USD) to customers during a promotional event, instead of 620,000 won ($426), triggering a 17% slump in bitcoin's price. (Reuters)