Stock Photography

Is a ctually a brilliant way of earning money while doing nothing.

I have a Nikon D70s and only 4 stock photographs uploaded on the Dreamstime.

Out of these 4 photographs:
1 is not selling at all
2 sold to generate a small revenue of 1.75 USD
1 sold 13 times and generated revenue of 9.25 USD

My total earnings (almost from 1 photograpgh) is 11 USD in 7 months.

Now I think: what if I had a portfolio of 300 photos...then the revenue (from doing nothing) would be (let the average be 7 USD) 2 100 USD per 7 months / ~300 USD per month.

Need to make lots of new pics during next vacation!