So lets narrow those vectors down to:
BTCE (10+ months old account)
HAVELOCK (6+ months old, most likely older)
CEX.IO (6+ months old, mst likely older)
BIT-MINING.CO (week old)
Ok nice list. Make sure you're 100% certain those are the only places you used your password.
i use my phone for all of this
How often do you use wifi and where? Wifi connections,
especially public ones are basically a hunting ground for anyone who has basic hacking knowledge. I myself, on a test trail, have stolen people's email passwords and hijacked sessions in public places like the airport, mall, universities, anywhere is unsafe. (Mind you I did this to test common wifi security vulnerabilities as a part of a project, I never did anything with the data collected other then verify that it could be used to access restricted accounts).
As far as I know 3G broadband is safe.