I'd normally be cynical about a claim like that too, but since he had very little posts and did not ask for donations I judged it to be a true story from somebody who just wanted to share their utter disappointment. I can always be mistaken of course. Whatever it may be, I'm sure cases like that do occur. People are just to gullible.
Well, if he had "very little posts" wouldn't it be more likely that he was trying to beg for donations later ?
What if he was doing it as a competitor trying to defame ?
In this anonymous scene, you should never assume that anyone is sharing a true story, unless they have proper proof (or trusted by you yourself to a huge degree).
Secondly, there is nothing such as a risk-less investment. The idea that someone invested money in order to "earn money for medicine for his dad" is just a bad idea.
Investing is a bad idea. (atleast if you have no knowledge of what you are investing in)