It’s likely state sponsored and some nation(NK is a common one) just paid for the weapons budget of the next few years
[0]: https://www.trmlabs.com/resources/blog/north-korea-steals-us...
The previous strategy North Korea used before Crypto was to make the best quality counterfeit US dollars ever made. That got somewhat countered. So North Korea was actually going to be in a bad place funding wise. Thank goodness everyone gave them trivial access to free money through crypto!
Thanks to Crypto and the Ukraine war, North Korea is doing really well for itself. Which, to be clear, means nuclear tipped ICBMs
Seriously, they have professionalized attacks on crypto infra to a degree that whenever you hear about a massive heist, you can be pretty sure it's North Korea.