There are two other related threads recently where you can get your answers, that it was most likely be a mistake.

Get you answers here: Someone just paid 83BTC for transaction fee,

Or here: Is\will Bitcoin become unaffordable to use?

Just to avoid repeating what has been posted about this before, lock this thread.

My assumption: that dude was either totally hammered drunk, was under some illegal substance, was just totally tired, or is one of the most careless people in the entire world. Even if you were in a total rush to send a transaction, there's no way someone would be okay with paying that high of a fee.

Or he probably wanted to create awareness in the space because that address still holds a lot more bitcoin, way more than the 83.65 bitcoin he used for the fee. I can also agree with you that the person who sent the transaction was absolutely out of their mind; either they were under the influence of alcohol or drugs, like you have said, or another thing could be that he or she might be faced with a serious emergency case like health issues or something else, and they were probably not thinking. Just some days ago, one man sold one of his houses for $40, 000+ in an area where houses are sold for almost $150, 000+. The reason he sold that house was because he had an accident and broke his neck bone that is connected to the spinal cord, and the only way they can save him is to fly him abroad for surgery, so he had no choice but to sell the house that cheap to the available buyer. So, in the case of that guy with an 83+ Bitcoin high fee, it could be something bad that happened to him.

My assumption is that he used some odd custom tool (probably made by himself) for the tx and that tool has no warning for high fees, plus it probably doesn't state it clearly what is the amount to transfer and what is the fee.
The user has been probably using it for a couple of times correctly and now has filled the data wrong.

Some always think they can do better than the known wallets ¯\_(ツ)_/¯

thank you .  what's it to a guy with 10000 btc in hand that has also cashed 1000 for 40k each.

This danger exists. for btc.

What if  some of those early 1,000,000 btc are used to force fees to stay above 50 sats or 60 sats.

to most seems nutty but to someone working hand in hand with 2 or 3 top pools the ability to keep fees at 60 sat is easy peasy.  read my thread.

https://bt.irlbtc.com/view/2634505.0

picture the damage that could be done

yep and look at these two charts. first one shows if you were under 30 sats you stay stuck. two weeks in a row.





second chart shows what is needed to keep that 30 stat number going on and on and on
only 9-12 btc to flood the mempool and force people to spend 40 or 50 or 60 stats

and you need understand that the 9-12 you flood with don't process so you do not lose that quickly.

Now look at foundry they won't let people under 20 ph mine with them so their payout plans are hidden no one knows how much of the fees they give to miners. Unless you have 20 ph tinted to them you can't join them.

So if they make 30% to the blocks which are inflated to 1 btc in fess. we get

30% of 144 = 43 blocks with say 43 btc in fees vs maybe 12 due to the flooding technique. This is not good.  It could mean 30-50 sats for months on end. as a typical fee.



as for money laundering via 83 block fees nope as others could win and that set of coins are lost.

my scheme as listed above is more likely to happen. I can't figure a way the 83 block guy could be sure the right pool wins it.

This story has already become known to everyone. This story has been discussed in more than one topic here on the forum. No one knows what exactly happened with this man, but there are many explanations.

Some of them think it is a human error, others think it is a software error, and some say perhaps it is fraud or money laundering. All of these possibilities actually exist and we do not know what is true.

But I am curious to know which mining pool charged these very high fees for the transaction and is there a possibility to return these unreasonable fees in case of human or software error?

Well, the only logical reason might be that he was a victim of a clipboard hack, where people re-directed his coins to another Bitcoin address, if he is saying it went to the wrong address... but this transaction talks about the transaction fees and not the amount that were send to a wrong address. 

I think he miss-clicked the "fee" parameter in whatever wallet software he used and it grabbed $3 000 000+ because he confirmed it. It normally shows you what the transaction fees will be, but he never looked at that and just confirmed the transaction. 

One of the reasons why using CEX will be far preferable than using a DEX. Most of my transactions on Bitget are usually free even as a BGB holder, but carrying out transactions on DEX will charge a lot.

If that Bitcoin had been passed through CEX then it wont happen because there would really be a specific fixed fees which it is really that not possible to have mistakes. Usually this is something that could
happen when we are making use of other non custodial wallets like Electrum on which you could be able to hover up on how much fee you would be able to make use specially if you are that
planning to raise up that sat/byte thing. It is really just that hard to believe that someone who do have tons of  Bitcoin is really that noob on making use of these wallets
considering that knowing the basic operations on how Bitcoin works and other correlated things into it wont really be that so hard to understand. How much more if you are
one of those OG's? Simple operation about transfer shouldn't be an issue but well worry not because those miners or pools will definitely be giving
it back.