Sorry for your loss but as a full member here you should know by now that when its gone its gone.
I would check your pc thoroughly for some malware/keylogger.
If it was me it would be fresh install time to be sure
i did that
how is it possible that they steal my coins when its encrypted and without the private keys
well i know when its gone its gone but i thought it was a flaw or something on the side of electrum