This comment needs to be pinned. We've had a similar situation where the person in coma took a bunch of loans in secret. We don't know why. We couldn't access any information. The bank doesn't reveal any of the process. We don't know if there is hidden property that we can inherit. We don't know if it was gambling, or charity, or if he was paying for someone's addiction. The whole family had to pool money to save the widow. He died a few weeks later and we have no idea where all the money went 'till this day.
A lot of people leveraged into cryptocurrencies the past few years. So if money seems to have disappeared, it could be something to look into if this person had ever talked about it. If he/she did, I'd be loooking for handwritten twelve word phrases, using the grep/find commands to search electronic records, etc...
