It really depends on how much you can invest into new hardware. There will always be different coins to mine but it will be difficult to keep a consistent income if your not working, in the long run it could work out very profitable but its the uncertainty that's the issue when it would be your main source of income.

If you have enough spare money to fund it then it's worth a try to see how it goes as long as you'd be able to get a job again if it fails.