Yes, you would need to have purchased Bitcoin from another source or have bitcoin already in a wallet to use this. There are some easy to use guides for this like this one - https://buycoins.helpdocs.io/article/blgin97496-cash-app-send36
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The person sending the funds can use any bitcoin wallet or exchange that supports Bitcoin. If the sender users Coinbase, Cash App, Gemini etc, there will be no issue with receiving funds
The key criteria is that they send from... (More)