To realize digital cash you need a payment network with accounts, balances, and transaction. That‘s easy to understand. One major problem every payment network has to solve is to prevent the so-called double spending: to prevent that one entity spends the same amount twice. Usually, this is done by a central server who keeps record about the balances.
The one and only, the first and most famous cryptocurrency. Bitcoin serves as a digital gold standard in the whole cryptocurrency-industry, is used as a global means of payment and is the de-facto currency of cyber-crime like darknet markets or ransomware. After seven years in existence, Bitcoin‘s price has increased from zero to more than 650 Dollar, and its transaction volume reached more than 200.000 daily transactions.
A high-rate money market account can be both a worthwhile investment and a shorter-term savings tool for liquid money. It’s a worthwhile investment for money that needs to earn a competitive APY (annual percentage yield) and be kept safe. One of the safest places is an eligible account at a Federal Deposit Insurance Corp. (FDIC) bank that’s within FDIC insurance limits. If your money market account is at an FDIC bank -- or has National Credit Union Share Insurance (NCUSIF) protection if it’s at an National Credit Union Administration (NCUA) credit union – then your account is covered if it’s within coverage limits.
The first decentralized cryptocurrency, bitcoin, was created in 2009 by pseudonymous developer Satoshi Nakamoto. It used SHA-256, a cryptographic hash function, as its proof-of-work scheme. In April 2011, Namecoin was created as an attempt at forming a decentralized DNS, which would make internet censorship very difficult. Soon after, in October 2011, Litecoin was released. It was the first successful cryptocurrency to use scrypt as its hash function instead of SHA-256. Another notable cryptocurrency, Peercoin was the first to use a proof-of-work/proof-of-stake hybrid.
It is important to note that, while money market funds are typically managed in a fairly safe manner, there would have been many more failures over this period if the companies offering the money market funds had not stepped in when necessary to support their fund (by way of infusing capital to reimburse security losses) and avoid having the funds break the buck. This was done because the expected cost to the business from allowing the fund value to drop—in lost customers and reputation—was greater than the amount needed to bail it out.
A Government money fund (as of the SEC's July 24, 2014 rule release) is one that invests at least 99.5% of its total assets in cash, government securities, and/or repurchase agreements that are “collateralized fully” (i.e., collateralized by cash or government securities). A Treasury fund is a type of government money fund that invests in US Treasury Bills, Bonds and Notes.
footnote*For the 10-year period ended June 30, 2019, 9 of 9 Vanguard money market funds outperformed their Lipper peer-group averages. Results will vary for other time periods. Only mutual funds and ETFs (exchange-traded funds) with a minimum 10-year history were included in the comparison. Source: Lipper, a Thomson Reuters Company. The competitive performance data shown represent past performance, which is not a guarantee of future results. View fund performance
The validity of each cryptocurrency's coins is provided by a blockchain. A blockchain is a continuously growing list of records, called blocks, which are linked and secured using cryptography. Each block typically contains a hash pointer as a link to a previous block, a timestamp and transaction data. By design, blockchains are inherently resistant to modification of the data. It is "an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way". For use as a distributed ledger, a blockchain is typically managed by a peer-to-peer network collectively adhering to a protocol for validating new blocks. Once recorded, the data in any given block cannot be altered retroactively without the alteration of all subsequent blocks, which requires collusion of the network majority.
The Securities and Exchange Commission (SEC) issued final rules that are designed to address money funds’ susceptibility to heavy redemptions in times of stress, improve their ability to manage and mitigate potential contagion from such redemptions, and increase the transparency of their risks, while preserving, as much as possible, their benefits.
The Money Market enables the commercial banks to use their excess reserves in profitable investment. The main objective of the commercial banks is to earn income from its reserves as well as maintain liquidity to meet the uncertain cash demand of the depositors. In the money market, the excess reserves of the commercial banks are invested in near-money assets (e.g., short-term bills of exchange), which are easily converted into cash. Thus, commercial banks earn profits without sacrificing liquidity.