For the third year running Forbes Blockchain 50 provides a definitive accounting of major global companies engaging in serious work with the technology first popularized by bitcoin. This year, thanks in part to bitcoin’s amazing surge, more large companies than ever before are embracing the fruits of this new technology, now offering bitcoin transactions to hundreds of millions of customers. Even certain banks are leading the charge, making it easier for clients to store bitcoin, ethereum, litecoin and bitcoin cash. Meanwhile enterprise blockchain applications are flourishing and creating real efficiencies.