If someone found #66 and withdrew with an extremely high transaction fee say 10k USD and then within 1 minute the scammers find the private key with kangaroo and submit their withdrawal with lets say 100k USD fee! Would the scammers still get it? Cause this means all the lower bit range puzzles are useless to even attempt.
Let's say it is like this.
In my opinion there are no scammers, in bitcoin laws whoever owns the private address owns the coins, these are the rules that Satoshi proposed
So 66,67,68,69, maybe others in the 70s ? have all become hot potatoes now.
Now it just becomes bragging rights and thats it.
Too many people will place higher fees unless you are very lucky.
How sad its become.