How far has the Ethereum blockchain come in the five years since its inception? We explore key developments, changes and challenges. It would seem that five years is a relatively short time for an information technology company, but Ethereum has made colossal progress during this time, growing from its own initial coin offering project to the largest blockchain platform, running about 2,000 decentralized applications. Today, the market capitalization of its native cryptocurrency, Ether (ETH), is worth $38 billion — larger than Ford Motor Company and the popular app Snapchat. Not only that, but the value of Ether has seen a…