The U.K.’s Financial Conduct Authority (FCA) plans to treat cryptocurrencies as high-risk investments, classifying cryptocurrencies as “restricted mass-market investments,” and will consult on new guidelines for its marketing rules, CoinDesk reported. Among them, advertisers of cryptocurrency services will face stricter regulations from October 8. Crypto companies must introduce a "cooling-off period" for first-time investors after October 8, and must also cancel the "refer a friend" reward program. Make sure cryptocurrency investors fully understand the risks.