I can relate - my father led a very busy life as doctor/surgeon and upon retirement he very nearly slid into depression because he didn't know what to do - and moreover life had passed him by while he was working no thanks to a lack of work-life balance

The thing that save him was a new career - in guess what - trading :) It keeps him on his feet so am grateful he discovered it - I don't even want to think what would happened if he didn't find a purpose like that