I would say don't settle down into something just because it's comfortable and pays well. I moved my way up quickly in a top investment bank and was earning pretty good but wasn't learning or being challenged. Gave it up earlier this year for a new career in psychology and graduated with a first class honours. Just started a masters, moving to the UK next year. It's a risk but I think back to the stressful job and opportunities I now have, learning every day and don't regret it. I could have been earning and not had to worry about that but I would be bored shitless!