No investment has assured returns which supports the idea that not all investment would make you rich in an instant. Also, successful investments mostly, suffered from failures for sure no matter how an investor is prepared of it. Some of them had thoughts of giving up. It already takes courage to start an investment so what more of continuing such thing. Risk will always be present and there are variables an investor won't have control of, which could contribute to an investment's downfall. In fact, most of the investors are atleast hoping for a breakeven between asset and expenses simply because negative outcome often occurs. It is okay to have desires or big dream out of something you have started but always manage the risk and expectations 'coz not all things would come as expected.
that is why in investing you must have a strong mentality in making risky decisions because not all in investing has an assurance to make you rich well there are some but we have different fate maybe someday it will happen to you and some of us might have breakdowns too as what you have said things will not come to our way and don't need to expect that much.