Wow much respect for johoe.
He should be hired as a professional tester by BTC hardware wallet companies.
Just curious what Johoe himself uses to store his bitcoins? Hardware wallet? Air-gapped machine? Multisig?
He mentions it at the bottom of his report:
I own two TREZORs myself (one for storing my savings and one for hacks like this) and I am still thinking hardware wallets are the best way to protect against most attack vectors.