As for me, the lesson I learned: You have to own your own landfill!!!
I was most affected by the last story. When I heard the story for the first time, I could not believe that all this great wealth was thrown into a landfill and the man was unable to convince the municipality to recover it!!!

Sad stories indeed. All these large amounts of Bitcoin have been forgotten. I do not expect their owners to ever be able to recover them. Totally unfortunate.

I am surprised that most of these are professionals and not beginners. I do not know how they committed these simple (fatal) mistakes. Two of them lost their passwords and the last one threw the hard drive in the garbage!!!

We have a popular proverb that says: “A smart man’s mistake is worth a thousand.”