Thanks my friend for this wonderful subject that I have seen
If you want to evaluate the opportunity correctly, you have to compare it with your real results. Not with your possible results. Compare them to your current status. Ask yourself: "Is this opportunity a step towards the goal?" If yes, it is worth trying. Deserves to seriously seek to seize it. Why? Because you will approach her from your goal. It may be a small step, but you will soon be closer.
Is not it easy to expect the next chance to be better, bigger and bigger? This is also a healthy indicator.
Small opportunities are often low risk. Meaning you will not lose much if the result is bad. You will have learned that this path will not lead you to what you want. Without significant risk. This is something you can not find in large opportunities, where risk is often - if things go wrong - large, and losses can be huge.