FinansBitcoin miners stung as fallout from price collapse widensShare prices of companies that validate crypto transactions have tumbled over the past monthCryptominers, which use powerful computers to create new units of bitcoin and validate transactions on blockchains, have been forced to change tack as tumbling crypto prices threaten to undermine their heavy investment in technology.Foto: Christinne Muschi/BloombergEva Szalay (FT)Scott Chipolina (FT)Joshua Oliver (FT)