Partnerships and initiatives featuring blockchain seem to be trumpeted every day. Projects that actually solve real-world problems are much rarer. The research firm Gartner surveyed 3,160 chief information officers this year and found that only 1% had put blockchain to work. Take the Australian mining giant BHP Billiton (ticker: BHP), which announced in 2016 that it would use blockchain to track its supply chain, including the movement of rock and fluid samples. But after the company tested it in a pilot project, a BHP executive said this month that the technology “hasn’t reached the point of maturity where we think it applies to us……..