My MEW got hacked and my tokens were stolen. I am very careful when putting my address on each bounty campaign and never sign up online which require any private key. I don't really know how I get phish or how hacker accessed my MEW. I learned my lesson and will never use private key again. Do you have any idea how I get phish? I got one in mind that a fake mew site does exist?
somone hacked your pc.
if you didnt give your wallet key anyone else, somone hacked you.
format your pc.
Very likely this ^^^.
Probably through a trojan virus you got through e-mail or other sites.
Do not store your wallet keys in your PC, either print it or store in a flash drive...I do both. I also use a hardware wallet (Ledger Nano S). It is expensive but considering the alternative, it is relatively very cheap.