Bitcoin miner Shota Siradze inspects a rack of bitcoin mining units wearing anti-static gloves. The components, all imported from China, include hashing boards, cooler fans and a power unit. “[A mining unit] is actually doing the same as a computer does, but it doesn’t give you a user interface," says Siradze. “It does a specific calculation it was given on the day it was built, it can do only that. It finds the block, it finds the transaction and approves that transaction – and that’s how we are getting our bitcoins.” Tbilisi, Republic of Georgia. Photo: Joe Harrison.