In the early days of Bitcoin The Coinkite (Coldcard) guys where at some points handling 5 000 000 BTC On hot wallet owned by them for the people with strong MFA, they never cheated on a single sat and it would have been a fatal blow to bitcoin trust at that time. It's super sad to see their HW has been found vulnerable. I hope they recover from this they are the good guys(TheKingfisher)