I just got 0.048049 BTC stolen because I entered my private keys online trying to sign transactions to spend 0.1999 BTC I had stuck in a multi-sig address. I managed to receive only

0.131 and 0.008 from https://blockchain.info/tx/bcbd90c0a4d198206865b8cccb227d6166d9b78b3c45d4ee66f8d83c6b69422f

and then from the 0.06 (that wasn't created by me) I received 0.011951 from https://blockchain.info/tx/fea862bdc6e827a0b25ad2d53a64cc3b5d408e27011a01adfbef165b643e8219

The remaining 0.0480377 BTC was sent to https://blockchain.info/address/1KT7sG84birTF2YvW5yP7G4NPeMs7Fcdbh and is lost/stolen

Also, they stole ALL of my 0.1999 BCH that was in https://blockdozer.com/address/33RZTwkqqixKySFim1oSXVcFFBAPUiBwLG

I am trying to find out how this happened since I never shared my private keys with anyone other than Coinb.in

I should have downloaded the offline version and used it only offline or avoided it all together. I didn't think of going offline because it was recommended by 2 savvy users and one of them was chatting with me online guiding me through the process...