Advantages and Disadvantages of Cryptocurrencies such as OneCoin Advantages of cryptocurrency A good cryptocurrency is quicker, cheaper, more private and more secure than alternative forms of payment. No manipulation Because cryptocurrencies are typically designed in such a way that the amount of coins produced are limited by an algorithm, no single person, company or country can control how much is produced. There can be no manipulation of the money supply – a common occurrence in the case of the U.S. dollar, say, which is controlled by the Federal Reserve. It is sometimes desirable to adjust the money supply, of course; but when it is done badly, it can lead to economic disaster. Some economists have argued that the monetary policies of a centralized system helped trigger the economic crisis of 2007-2008. Speed Transactions done with cryptocurrencies are usually quick – they can take less than 10 minutes – and are certainly faster than posting a check or dispatching an international money transfer.