According to The Economist, which of the following are "deep and related" problems that Bitcoin has experienced since its creation. (March 2019 Economist article) 1. The tech community has become uniformly pessimistic that Bitcoin will ever displace currencies issued by central banks. 2. The volume of transactions made with Bitcoin has remained low, and much of it represents speculation rather than payments for goods and services. 3. Because of its decentralized method of verifying the validity of payments, Bitcoin has turned out to be much slower at processing payments than the credit card networks. 4. Bitcoin has been vulnerable to fraud because most users store, buy and sell Bitcoins on exchanges rather than their computers. A. 1, 2, and 3 B. 1, 3, and 4 C. 2, 3, and 4 D. 1, 2, 3, and 4