The decision is left for you to make: where did you receive the money, your exchange address or a personal wallet that you have total control of? If you know you are not expecting money from anyone and you are sure the money did not belong to you and you are also not the type that takes what belongs to others, I think the best thing for you to do is to send it back to the sender. You can trace back who ever sent the coin from the transaction history, then you can get the wallet address, and you can just send it back to where it came from.

If this is actually true, it's a lot of money to even come out in the open and be announced, and this kind of money can give one a lot of positive thinking, so it's now left for you to choose what to do with it.

Post the transaction ID and sign message using the wallet address that received the funds or this never happened. How come receiving huge amount is a problem to you. You can send it back to the address that sent it to you if you are bothered or use mixer to have a privacy to that amount.

If this is true, You will not gonna make a public post about it since you are just attracting scammers that will claim ownership for that amount.

It sounds like a fairy tale because someone will send 65 bitcoins to your wallet and you will receive it. But if this is true then you will keep the 65 bitcoins you received in your wallet and spend it on your future needs.

First it is tricky to actually decide on what do currently, because one it could be a stolen funds looking at how huge this is and probably the thief went through something like a mixer. So the first thing to do is to wait a little bit and check the public key or address from which the funds came from since everything is recorded on the public ledger this will give you the idea of how that address sends out this funds. If coincidentally the address actually sends similar funds to multiple address like yours then I will advise you to wait a little bit maybe some information will come out.

I doubt this is just a serial mistake of copying wrong address considering the number of bitcoin involved. And if you hastily send out this coins back now you might be aiding a thief or you yourself getting into a hacking scam

 Personally it's not a tough decision for me because I'd just not touch it. With the way hackers are on the loose, it's possible that you've just received BTC that a hacker was trying to move to another address and unfortunately or fortunately as the case maybe, must have entered yours.
 It's a huge amount and I understand your dilemma, OP, but I think I'd consider this option or possibly send it back. Your call.

I follow the rule: your keys, your crypto, so do whatever you want with them. Assuming, of course, that this situation is true, because it's hard to believe that someone sends such an amount to an unknown address.
If this happened to me, it is an amount that would definitely allow me to change my current life and I would not hesitate for a moment to properly manage these funds. I would pay taxes honestly, then buy a new house, a car, and invest the rest.

I just can't stop my self from reading your post saying i just received 65 BTC, i mean really, where is the transaction detail, can you prove yourself or are you just bluffing because it's looks like you just wants to attract some attention here but mate let me tell you. You do not need to create such scenarios which looks like lies as you can still get attention.

But if you do really received 65 BTC, then its a good news for you, but be assure from where you had received them are they white or black (i hope you understand) do no try to withdraw them from CEX because if they are black then you might be questioned by Authorities near you. (It's just my thought i am not asking you to do it) but if you do want to return it to the real owner be aware of that too because they would get in some problem if they are that rich. Its upto to give them back or not because who are we to tell you,. If you are a man of morality and does not care about money then you should give them back but before returning it to them make a public announcement and share the news with News companies and on social media and you can get famous by using this scenario as i think its a big news. But still, if i were you, i would give them back no wonder my life would become more easy but still its not my money someone mistakenly send it to you so i would prefer to give it to them but i would also try to get some fame because that's at least i could do. (at the end it all depends on you)

An individual who would send that much money using BTC will definitely double-check and triple-check the address before confirming. If he still made a mistake after that, he really is careless. He will not get the BTC back whoever he may complain. But the OP's story however may not be true though.

Like anyone above, they would appreciate it if there is a tx ID and his inbox will really be a party if he posts it. If I got the 65BTC, I would wait if someone claims it and strike a deal.

You should already know what is the right thing to do, asking people about it would just mislead you further.
In any case, anyone receiving any amount by mistake should post both receiving and sending addresses on social media, forums etc, to make it easier for the rightful owner to find you, then after making sure he/she controls the sending address, you should give him back all without taking 1 satoshi, the owner would give you a tip if he wants.

You might even want to ask him how much should you keep as a prize before returning them, and he might out of fear of loosing all of his coins tell you an amount which he is not satisfied to give whatsoever just to keep you happy and take some of his money back.

Doing something good has any worth if you do it with no expectation from people, God will make it up to you in a way that would result much better than doing good expecting something in return.😉

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Enough of ethical lessons, are you going to share some of that free loot or what? Come on man, this is a community ship, we share and care. Lol.

The topic is a hot bed for swarms of sig posters. 😉