Wall of coins has an FAQ page which answers most of the queries. Can you sell bitcoins? Disclaimer: This information should not be interpreted as an endorsement of cryptocurrency or any specific provider, service or offering. While generating the wallet, a unique, secure mnemonic seed phrase is generated, which will be used as a master key to your account. You can buy Bitcoin with cash. You will get more information on the location, like the store’s hours, fees, phone number, and instructions for buying the coins:.