Yeah, that's a pretty big tell right there...just short of wearing a sign saying 'I like to fight dirty'.
I have seen people who have lots of rings who rarely fight, if ever.
Watch out for this bruiser, she'll kick your butt
Others who wear them like brass knuckles.
They come from all walks of life, and a lot of them are not bikers.
I have never seen anyone who uses a wallet chain (mostly bikers and truckers) use one as a weapon in a fight, despite what that lame website you linked says.