How does one get a fire icon by their name to have it stay there?

Placing a bet of a small amount about half a mbtc then winning seemed to have given me one.

Does it have any benefit other then showing in chat you have placed a bet and won a certain amount?
there is no other benefit for you if you have the fire icon and you need to be a high roller to obtain the fire icon
if you had the fire icon it just makes other people chat you and begging for bitcoin