He is not giving us much detail but what if this wasnt a hack but instead someone physically broke into his house. He is claiming that they got his Bitcoin on cold storage, how else can that be stolen?
If hardware wallet or electrum was compromised then we would get more reports. Maybe some quantum computer hacked his private key but why only go for 200btc when you could go for multiplies higher.
No idea what to make of this. There is also a poll and 65% think he wasnt really hacked.