Does blockchain offer hype or hope?

For many tech insiders, the most exciting thing about bitcoin is the thing that allows it to function: blockchain. What is it and what other uses might it have?These days, bitcoin is front-page news, as its price’s vertiginous ups and downs elicit glee and despondency by turns among investors. It was not always this way: the now-definitely-in-a-bubble cryptocurrency is making a comeback following years in which its association with crime and darknet drug markets kept it away from the spotl