Following your passion is usually the best for success in life, or at least for personal satisfaction. My passion is realistic diecast toy cars, although many of them are not so much toys but rather accurate scale models.
As I search Dreamstime, I found a definite lack of images of accurate scale model miniature cars, so I took it upon myself to photograph some from my own collection. The result is an ever-increasing assortment of Dreamstime online photos as I submit example daily, and get more of them approved and on-line every day.
I especially like those that are rarely seen in miniature. Concept cars, such as the Lincoln Navicross seen here, seem to be the rarest. As I find other rarely reproduced automotive miniatures, I buy them and add them to my collection... and to Dreamstime. I've started creating online collections through Dreamstime, initially of realistic toy fire trucks and vintage cars, but eventually will include other categories as well. See them at Toy Fire Trucks
and Toy Vintage Cars
A report from about a decade ago reported that there are some 1.2 million collectors of diecast toy cars. I think that number has increased substantially since then, mostly due to the increasing popularity of Hot Wheels.
I consider myself lucky that my mother didn't give away, sell, or throw out my old Matchbox toys. I still have most of them from my youth, a distant 45 years ago, and add new models to the collection regularly.