i think it's good idea to full time on bitcoin, it's not diffirent with your real job, you can be progamer or open new startup, then you can withdraw your bitcoin and use the fiat. it's a normal nothing diffirent with your job.
Before shifting to full time bitcoin worker, you must think it a hundred times before setting up a decision that you are going to full time in it.
Because for me it is better to have full time day job to be focus to and just treat bitcoin job for part time.
Yeah and depending only on bitcoin for living can be really risky as it doesn't offer us all those benefits that full time job can offer and there is no stable income in bitcoins.