How do you manage your finances? An interesting, and probably useful, comparison. I would not expect to even try to set up my finances to persist indefinitely

How do you manage your finances? An interesting, and probably useful, comparison. I would not expect to even try to set up my finances to persist indefinitely beyond my lifetime; I would hand that responsibility over to my children. If the banks I had used went out of business, they would need to take action to move the money to different banks. I can do my best to maintain photo backups, either film or digital, but there's no plausible way to set up backups that last forever without eventually turning stewardship of those backups over to someone else. So rather than setting out to depend on Amazon or Flickr or whatever, understand what makes a backup service reliable in the short term, and pass that understanding on.