MarketWatch photo illustration/iStockphoto Tomi Blockchain technology isn’t just for little-known companies trying to make a name for themselves, or struggling former blue-chip companies trying to rebrand themselves as innovative. It is the real deal, as a number of household names have been boarding the blockchain bandwagon. Blockchain acts as a decentralized ledger that can be used to record and verify transactions, without the participation of a middleman. Even some Wall Street analysts...