In order to buy or sell cryptocurrency, you must first find an exchange that trades in the particular token or coins that you are interested in. You will also need to fund your account with fiat currency or digital assets such as Bitcoin or Ether in order to purchase the cryptocurrency tokens. Once you’ve done this, you will be able to place either a buy or sell order on the exchange. Depending on the exchange, you may receive your purchased digital tokens directly, or they may be held by the exchange and then sent to your wallet. As always, it is important to remember to use only exchanges that are reputable and have a good track record for security.