By the way. Did any of the topic participants even find private keys? A rhetorical question.
The last two opened keys were moved to the same address, but for a very long time they did not take a penny. Apparently, he did it for fun and not for almost a million bucks?
This all looks like nonsense. I've found the "author's" message and it's unconvincing. "Safety prove" sounds like nonsense, unless the author really don't knows how to entertain himself at his own cost.
There are too many people here who are hitting the 66th key. The number is not so large that this would not happen over so many years for so many people. Perhaps the author was just joking with everyone and he opened all the wallets himself. Thinking out loud...