https://relai.app/de/21-bitcoin-basics/Relai AG is a startup that offers an easy-to-use app for investing in Bitcoin. As an investor in this startup and a Bitcoin supporter, I highly recommend the app, which simplifies the process of buying and managing Bitcoin. Additionally, Relai provides an interesting and straightforward guide on Bitcoin basics, ideal for newcomers who want to learn about Bitcoin, its unique aspects, and how to handle it securely. For more detailed information, you can explore their [21 Bitcoin Basics guide](https://relai.app/de/21-bitcoin-basics/).