1. Find a cryptocurrency exchange that allows for fiat currency transactions. Many major exchanges, such as Coinbase and Binance, allow the purchase and sale of cryptocurrencies with fiat currency.
2. Sign-up for an account on the chosen exchange. This will often require submitting personal information and documentation to verify your identity.
3. Connect your bank account or credit/debit card to the exchange so you can fund your purchase or provide funds to make a sale.
4. Choose the amount of crypto you want to buy or the amount of fiat currency you want to sell.
5. Confirm your transaction and wait for the transfer to be completed. The time it takes for a transaction to be processed varies depending on the exchange and type of currency.