My friend lost access to 10 000 Bitcoins!

Hello! A friend of mine 6 years ago played on one site games. And he gave bitcoins. Then they cost pennies. Over the years it has collected 10 000 bitcoins! Who knew that the price will rise so much?)) In General, he was bored of playing. And he's not saving the passwords from the purses changed system, Windows. Of course when he saw the price of bitcoin was just amazed! Don't lose passwords for their money;)) Especially if it is a cryptocurrency!) peace to you!