There are a lot of storytellers on the forum, but maybe for the OP, the few dollars he was able to win are the perfect profit. And I do not see the need for him to prove something; no one here owes anything to anyone. 
Your thoughts align with mine in this aspect. Like why are they even asking him/her to prove what he said while he's not soliciting for help or funds? There are numerous cook stories of this type in the forum which have make the authenticity of such experiences questionable. Majority of them are after merits. I used to overlook and scroll pass such posts. Yo'll can do same, that would reduce the fabricated story of Bitcoin, I think.