Quais são os benefícios de investir em Bitcoin?

Inquiring minds often wonder about the benefits of investing in Bitcoin. Could you elaborate on the key advantages that attract investors to this leading cryptocurrency? For instance, how does Bitcoin's decentralized nature provide an unparalleled level of security? Furthermore, how has the limited supply of Bitcoin, with a cap of 21 million coins, influenced its value appreciation over time? Lastly, could you discuss the global adoption of Bitcoin as a means of payment and how this is shaping the future of digital finance?