I agree, its better not to brag our winnings and just keep it to ourselves for our own safety.
We dont know the capability of those people who are envy and has bad intention towards us thus its better to be safe than sorry.
This is common knowledge. Anyone with a half-decent brain knows that revealing their wins publicly could make them a target, but some people still reveal them anyway for obvious reasons and some of them get screwed later on.
Some of them would be thinking that how they would do something from me if they don't know my identity?
It would really be just dumb that you would really be showing off and bragging your wins but if you aren't that really revealing any traces about your identity then I don't
really see any problems but it would be much better and safe if you don't consider on doing such thing in the first place.
doing so will put you at risk. we don't know how these scammers work. they can even search all the posts that you had and get some info that you thought would not put you at risk. so yeah, better keep it to yourself before you regret your action. scammers know how to extract info that will make you a vulnerable target.
to avoid such situation, just be happy that you got your winnings and don't play being an egocentric individual.