He's one of the best freelancer graphic designers I know and I hope he will continue being so.
So, yes, for some going all in on BTC is definitely possible.
This kind of lifestyle will be to the owners of casinos and some exchanges small projects arent able to make a live from bitcoin, can get extra income and just that. With skill you will be working at some company instead being searching for small projects and paying lower then real market.
Not really.
Your view is flawed a bit, but you are correct on the ventures you speak of for people who own a site that generates profits through a gambling site/exchange.
Theres still a vast market for other areas that need bitcoins service.