NEM (New Economy Movement) is an ecosystem of platforms that use blockchain and cryptography to provide solutions for businesses and individuals. XEM is the native cryptocurrency of NEM’s NIS1 public blockchain. XEM has a number of unique feature, including the way the NIS1 blockchain is secured. NIS1 uses its own proof-of-importance (PoI) algorithm — as opposed to the far more widespread proof-of-work and proof-of-stake