A leading cryptographer, the inventor of hashcash, which is used in the Bitcoin (BTC) mining process, says it is time to call time on satoshis, the units that make up a bitcoin. With BTC prices soaring sky-high in recent weeks, the CEO of the blockchain technology firm Blockstream, Adam Back, has taken to Twitter (where else?) to opine that satoshis (or sats for short) have had their day. “Bitcoin is too expensive, but sats are too many, sound cheap and confusing.” Back, who was one of the first...