Even the best security can't protect from Government exploits. Remember all those NSA tools that are now available to hackers, not to mention all the other tools available on the darknet. Then you have possible inside jobs. But as this story shows the good part of Crypto is getting smarter and faster at beating the bad guys. For the hackers this is about money, they are basically bank robbers. Take away the profit reduce the robberies. Ofcourse half of 30mill is stil 15000000. The attack itself must have cost a lot of money to organize(safe location, hardware, software, employees, manager etc.)