Long story short, people from Wired, a monthly American magazine on technology, have recently found out that a large, combined hacker attack under the code name ”Collection#1” have gathered over 87 gigabytes of e-loot. Among it are 773 million e-mail addresses, which perhaps is not bad in itself, and 21 million passwords to some of these addresses, which is bad indeed. All this data has been gathered over a number of lesser attacks and has all been stored on the Mega hosting platform. It is not improbable that your address and password are among them; it might be wise to change them now, just in case.