First of all, well-known large exchanges are not necessarily good. Most of them are only established for a long time, and they are relatively lacking in terms of function and security. Secondly, how do ordinary people judge the security of a digital asset exchange, start with the following points. Is there a multi-level firewall, multi-signature, hot and cold isolation wallet, a hundred-person technical team rotates 24 hours a day, etc. This guarantees the security of platform users' encrypted assets and transactions. As far as I know, the well-known exchanges are equipped with ZB.com, huobi global, coinbase, etc.