Compared to Cambodia, sure, but it's an international crime gang, with this particular one being just one branch. I wonder if this was their biggest hoard or if they had more?
Really poor financial management to have all that money concentrated that much though. It either means they dropped the ball bigly, or this is spare change for them... although Bitcoin's market cap is $2.24 trillion at the moment, $15 billion is a significant chunk of that.
I expect it would be pretty significant probably when compared to the actual fiat inflows/outflows to and from the cryptocurrency market.
Trying to liquidate $15bn to USD reasonably quickly would very likely cause a massive drop the price, which would correspondingly drop the market cap by potentially many times that $15bn.
That doesn't appear to be how they seized the funds though, the criminal hasn't been caught so they must have hacked his devices to gain access to the private keys. No $5 wrench involved.
I assume by wrote down you mean they saved it in a file somewhere. Amusing to think it would have been safe from that kind of hack if they'd written it on a post it node and stuck it on the bottom of their keyboard.
Really poor financial management to have all that money concentrated that much though. It either means they dropped the ball bigly, or this is spare change for them... although Bitcoin's market cap is $2.24 trillion at the moment, $15 billion is a significant chunk of that.