Logically, there is no risk. It is a total of 21 million currency, corresponding to the growing total amount of global legal currency, the exchange rate must be rising. But in reality, bitcoin has three risks: the first one is too few to agree with it (the risk has been greatly reduced as the bitcoin breaks a million dollars and the public has greatly increased its awareness of it); second , The current distribution of bitcoin is too concentrated – few people, with the vast majority of bitcoin. It is risky to watch in a band when the price is getting higher and the distribution is getting better. Third, bitcoin can compete and at least suck away some chips (legal currency). But Bitcoin is perfect. The essence of digital money is nothing more than algorithms and encryption. Bitcoin does not have any advantages over bitcoin. In the Internet world, there is no second place. So I’m not optimistic about bitcoin.