Nano is the rebranded, renamed version of RaiBlocks. The rebranding took place in January 2018, but nothing else has changed regarding the fundamentals of the coin.
Nano hopes to be a productive, viable alternative for fiat currencies.
In Nano's white paper, the cryptocurrency's development team express their concerns about Bitcoin's scalability issues, Bitcoin's computational latency and high energy consumption.
Using its own block-lattice structure, Nano wants to succeed where Bitcoin falls short.
In short, Nano's Block-Lattice infrastructure can, in theory, offer a solution to Bitcoin's latency and scalability problems.
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