If you can earn money and make a living in general then you should be able to do the same with bitcoin.
The only difference really is the payment method and as bitcoin becomes more widespread and used, the time will come that most people will pay or get paid in it.
Yes that might happen. I have friends like single mothers who are working at home and they are still paid in US dollars. It is an online work so maybe someday they will also be changed to a bitcoin payment if they prefer it.
There are already a lot of opportunities online just waiting to be discovered. We know a lot of people who just work from home and earn big amounts with their online jobs. These earnings can then be used to buy bitcoin.
To be completely honest I haven't actually heard a legitimate success story when it comes to people who work online doing anything aside from some financial occupation, and some of the best stories I've heard have only placed the people around $70,000 USD a year, maximum. Most of the people I have heard typically fall below that number, and I would say that is an ok wage, but it could probably be better. But I don't know their situation, so whatever works best for them.
70k per year is far more than what most Americans make. But its very possible to create a success story by doing the calculations and also if certain things are available like cheap electricity, how cheap you paid for equipment, and how much your hashing (scale). Huge farms exist that make huge profit because they get all these things. But i believe its possible to mimic this in small scale if you can allign these. Fine a way to get cheap electricty, houseing for units and get cheap gear or very effecient gear and get mining, if mining is what you want to do. You can also just simple invest in Bitcoin and play the market. So many avenues to take with Bitcoin is what makes it nice and makes a lot of things possible