I wouldn't do anything. Don't sign in to the account it's in.
In other words, forget about it and the fact that the account it's in exists - for now.
And here's why: firstly, because
It's incredibly unlikely that someone accidentally transferred $750,000 from their VS to you.
A purchase of goods for such an amount is unlikely, and even less likely (to the point of “damn impossible”) is a mistake with the destination address.
In fact, I can only think of one semi-plausible scenario in which this amount of BC could be transferred to you: a hacker who had accumulated a bunch of stolen Bitcoins was trying to move/merge them and mistakenly copied/pasted the destination address. from your list of (stolen) addresses instead of your own. And the one he stuck on turned out to be yours.
This means that (1) your address is on the list of stolen information and (2) you just received stolen property.
So I definitely wouldn’t return it, because if you do that, the thief wins. But I also wouldn't hand this over to the government because the most likely scenario is that it's a foreign hacker that they won't be able to identify or prosecute anyway.
Obviously, a thief would never report the theft, and it's likely that it hasn't been stolen recently - it's likely an accumulation of small quantities of aircraft that were lost back in the Mt Gox hack, meaning no one looking for this.
The US government considers Bitcoin to be property, not currency, and the statute of limitations for receiving stolen property is three years. However, if you haven't even logged into that account for three years, then it's entirely possible that you didn't know it was there, clearly weren't part of the theft, and didn't even know how or why. he got to you.
But if you transfer it or cash out now, you will be registered
$BTC There will most likely not be an investigation and no one is looking for it. If three years have passed and the money is still showing up in your wallet, do whatever you want.#ВТС 
