One of the currencies I have recently looked into is Decred. From a quick perusal, it purportedly aims to solidify Decentralized Blockchain Governance. This is a tricky issue in the constantly evolving sphere of cryptocurrencies. According to information gleaned through their website, Decred allows users to seamlessly transition from one set of consensus rules to another. A newly developed software by Decred enables trustless OTC exchanges between Decred, Litecoin and Bitcoin, via a cross-chain atomic swap. Decred uses an innovative hybrid proof-of-work (PoW)/proof-of-stake (PoS) system similar to proof-of-activity (PoA) to address transition from one set of consensus rules of one currency to another and gives users of the currency decision-making power about the set of consensus rules to activate. More reading here:
https://medium.com/decred/decred-cross-chain-atomic-swaps-eliminating-trust-from-trades-a5dae2d48bfa