Generally, a high-rate money market account pays a higher APY than a checking account because banks can assume that your money will be in there for a longer period. Yes, you could withdraw from a money market account – just like you could in a checking account – but a money market account has built-in restrictions because its transactions are restricted under Regulation D. Unlike a checking account, money market accounts are limited to six “convenient” transfers and withdrawals per month. According to the Federal Reserve, these restricted transfers and withdrawals include transfers to another account to act as overdraft protection, direct bill payments, telephone transfers, withdrawals initiated by fax, computer, email or internet instruction, and transfers or withdrawals made by check, debit card or other similar method used to pay other third parties.
Since prices are based on supply and demand, the rate at which a cryptocurrency can be exchanged for another currency can fluctuate widely. However, plenty of research has been undertaken to identify the fundamental price drivers of cryptocurrencies. Bitcoin has indeed experienced some rapid surges and collapses in value, reaching as high as $19,000 per bitcoin in December of 2017 before returning to around $7,000 in the following months. Cryptocurrencies are thus considered by some economists to be a short-lived fad or speculative bubble. There is concern especially that the currency units, such as bitcoins, are not rooted in any material goods. Some research has identified that the cost of producing a bitcoin, which takes an increasingly large amount of energy, is directly related to its market price.
The types of debt securities held by money market mutual funds are required by federal regulation to be very short in maturity and high in credit quality. All money market funds comply with industry-standard regulatory requirements regarding the quality, maturity, liquidity, and diversification of the fund’s investments. Investments can include short-term U.S. Treasury securities, federal agency notes, Eurodollar deposits, repurchase agreements, certificates of deposit, corporate commercial paper, and obligations of states, cities, or other types of municipal agencies—depending on the focus of the fund.
There are also purely technical elements to consider. For example, technological advancement in cryptocurrencies such as bitcoin result in high up-front costs to miners in the form of specialized hardware and software. Cryptocurrency transactions are normally irreversible after a number of blocks confirm the transaction. Additionally, cryptocurrency private keys can be permanently lost from local storage due to malware, data loss or the destruction of the physical media. This prevents the cryptocurrency from being spent, resulting in its effective removal from the markets.
The money market consists of financial institutions and dealers in money or credit who wish to either borrow or lend. Participants borrow and lend for short periods, typically up to twelve months. Money market trades in short-term financial instruments commonly called "paper". This contrasts with the capital market for longer-term funding, which is supplied by bonds and equity.