As of now there no international regulatory bodies in the cryptospace to the regulate the manipulation and fraud prevention. SEC helps to regulate and take action on the fraud prevention but it's limited only in the USA. But today I got to read news about Winklevoss brothers forming sled regulatory body and are getting supports from lot of crypto exchanges. You can find more information here https://www.moneycontrol.com/news/business/cryptocurrency/crypto-exchanges-join-winklevoss-brothers-for-a-self-regulatory-organisation-2865741.html/amp