As a newcomer to LEGO, I'll just say that I have heard all this before - about 16 years ago, when venerable old booksellers told me that what I was doing wasn't going to work, that the book market was dying (this was before e-readers, which actually will affect the book market and are starting to, but really not all that rapidly in many areas), that their way was the only good way to do things.
They believed it, too. Hell, some of them STILL argue with me to this day that I'm doing it wrong. It doesn't make their way wrong either, there is just more than one way to skin cats and sell books or LEGO. Some of the newbies they lectured did go out of business rapidly. Some of us made it. Some of the lecturers are still around, some didn't last the market changes themselves.
Selling is a matter of numbers in quantifiable cost, time, effort, and knowledge.
LEGO isn't different or special versus selling books or Barbies or lumber or potatoes.
What makes me successful as a businessperson is understanding numbers and customer service, having excellent organizational skills, a bit of working capital, an aversion to debt and its risks, and a lamentable absence of the Fear of Failure gene. I'm quite annoying about falling down, picking myself up and dusting myself off cheerfully, and going to plans B, C, D...
Some new people will fail, some will succeed. Some old people will fade away unable to change with the times, some will change and thrive.
No market stays stagnant - that's a fact of business and nature. Change or die.
I don't know the definition of "real money" - it honestly isn't of a lot of interest to me. I know my numbers, my projections, my goals to meet. If I get what I'm after, I'm calling it a win.
Maybe I could make more buying and holding for a really long time, or day trading in the stock market, or putting it all on "black" at the first open casino, or quick flipping LEGO, or joining the circus (I mean, you don't meet talking frogs every day)... but that's not my plan.
I have no new angle. I look at what the market wants, I select from those wants the things I think I can provide well. It's that simple and that hard.
(Edited for hilarious typos).