Oct 29 (Reuters) - Binance, the world's largest cryptocurrency exchange, said on Thursday it had frozen $3 billion in crypto assets as it investigated a potential security breach, with stablecoin issuers Circle CRCL.N and Tether freezing related assets. Bitcoin market in chaos amid fears Binance cryptocurrency exchange hit by biggest hack in history - Billions of dollars worth of digital currency may have been stolen in suspect security breach at.