The distribution of 500 has stopped, but even if it hadn't, spending such a large amount is almost impossible.
Tell me about it, because I have a problem even if I try to pay with a EUR 100 bill, given that we have just entered the Eurozone and our ATMs only pay out denominations of EUR 5, 10 and 20, and the national currency was even 7.5 times weaker than euros. I doubt that I will ever see a 500 EUR bill.
Bringing a ton of cash through the airport is impossible without going through customs declaration; that's why GazetaBitcoin mentioned splitting the money into a few trips. On the other hand, having a decent amount of undeclared cash doesn't help at all, because you can't actually use them for large cash purchases.
This should not be a problem if you are traveling within the Schengen Area, although I cannot say whether the procedure at airports is the same as at road border crossings where the border does not actually exist. Romania and Bulgaria are not part of that zone, and that's why things get complicated there, but if you choose another country, then theoretically you can cross the border without expecting any control.
Of course, all this is assuming that you don't act too nervous and suspicious at the airport, because such people attract attention.
Yes, that's a good question and I can't answer it either. Perhaps the person originally did not want to put the money into the account and later changed their mind.
However, there were also times when you could lose your bank account if the bank could see that the money came from selling cryptocurrency. There were a lot of cases like that, even if that hardly ever happens nowadays. Maybe the seller wanted to cover this up. That would actually be the most plausible explanation for this, because the case was two or three years ago.
There are multiple ways to bypass that, such as withdrawing to a Revolut account and then to your bank, but anyway.However, there were also times when you could lose your bank account if the bank could see that the money came from selling cryptocurrency. There were a lot of cases like that, even if that hardly ever happens nowadays. Maybe the seller wanted to cover this up. That would actually be the most plausible explanation for this, because the case was two or three years ago.