CryptoCrunchApp explains what Bitcoins are and how they work

Bitcoin is the first digital currency, aka cryptocurrency, which operates free of any central control or oversight of banks or governments. Bitcoin is built on a distributed digital record called a blockchain, which is a linked body of data, made up of units (blocks) containing information about each transaction, including date and time, total value, buyer and seller, and a unique identifying code for each exchange. Bitcoin purchases are not instantaneous like many other equity purchases, it may take you at least 10 to 20 minutes to see your Bitcoin purchase in your account. While Bitcoin is expensive, you can purchase fractional Bitcoin from some vendors, which are generally small percentages of your crypto transaction amount but can add up on small-dollar purchases. You can even now do so in special retirement accounts called Bitcoin IRAs Source