Which crypto is closest to Bitcoin?

In the vast landscape of cryptocurrencies, there is always a lingering question among enthusiasts and investors alike: "Which crypto is closest to Bitcoin?" This query often arises as a search for a digital asset that not only mirrors the functionality and technological underpinnings of the pioneer cryptocurrency, but also resonates with its original vision and core principles. With the ever-evolving nature of the crypto space, it's not a straightforward task to identify a clear-cut "closest" contender. However, some projects have indeed emerged as contenders, aiming to replicate or enhance the core tenets of Bitcoin, such as decentralization, scarcity, and secure transactions. But the question remains: which one truly stands out as the closest to the original Bitcoin in its essence and application?