Better to have a rolex or non-gambling related jewelery at the BJ table. You want to show 'rich' memes, not 'I take gambling seriously' memes. At the poker table it is different. Others may have different opinions.
I never said wear it at the blackjack table. At the bj table other kinds of jewelry would be more appropriate as to not identify you as a serious player but away from the tables, it is some pretty nice stuff to wear