On May 19th, 2020, since February 2020, Bitcoin was, for the fist time, traded at the record price of $9.729, and quickly surpassed the peak of $10.000 on June 1st, 2020. According to DeCambre (2020), Bitcoin prices could be up to 32% in 2020 and the speculation on Bitcoin and many other altcoins will be held up high in the market. These facts show that most of the cryptocurrency users have treated cryptocurrencies as speculative instruments rather than approaching and eventually utilizing them with their birth functions or uses including means of payment, medium of exchange, and an invesment tool. Hence, understanding the various uses of cryptocurrencies will not only considerably help the cryptocurrency users enrich their knowledge of crytocurrency, encouraging them to proactively use cryptocurrency in less-risky activities as speculating so that the crypocurrency market could be more stabilized and attractive, but also provide policy markers a more optimistic view on cryptocurrencies which could drive them to design appropriate responses and policy towards cryptocurrencies. This paper, by focusing on analysing different uses of cryptocurrencies in an economy coupled with severe threats facing while using cryptocurrencies including terrorím financing, money laundering, fraud,…, eventually produces some policy recommendations for Vietnam in the context of the promising outreach of cryptocurrencies in the future, of which the mainline is accepting and regulating cryptocurrencies.