Wow! What a success story.
Even if that is my achievement, I will not easily share that in public but maybe I will only share to my closest friends that I believe they will not tell others. But suppose that is about getting amazed by them because of my big winning. In that case, that will depend on each people because some people are proud to share their big winning and that is not wrong to tell the public about the big wins.
It is hard to confirm whether that is right or wrong, fake or real. When that is available on the internet, anything can happen unless someone closest to us can clarify that. We can agree that @OP gets a big win from gambling.
There's nothing wrong sharing your successes in the internet. No one knows you personally and there's no threat at all and that's why when someone shares his success, we should just be happy for them.
It's an achievement for them to share and maybe they don't have any others on their back to be proud of their achievement. So, let's all just be happy when someone does it.