Silly question about theoretical return.

I seem to always have this number bouncing through my head and I would like to either verify it, or debunk it for the sake of education. Forewarning: I'm Canadian, but this shouldn't matter too much. Anyhoo, here's my question:

Is it reasonable to be able to expect a return of 10% per annum on your investments?

Ideally, I would like to think that if I saved up $1 million from my bank-robbing business on the side that I would be able to retire on an income of about $100K/year. I understand that inflation would eat this right up, but that gets to a bit of a deeper problem that I'm not too concerned with at the time.

Any comments?

Pilket