Perfectly safe now that they’ve disabled trading, you don’t have to worry about it anymore because you can’t do it.
That being said, trading was always a shady business in this game, never can tell if you’re trading with some one who got their gold from RMT, exploits, duping, etc. or legitimately. When they finally decide to restore trading I would still be cautious, trade only with friends you absolutely trust, or just don’t trade at all.