According to ChainCatcher, Fortitude Mining's parent company, Digital Currency Group, has increased its existing credit line from $26 million to $50 million, with an additional commitment of $24 million. Fortitude Mining currently has approximately $31 million in available borrowings, which are expected to be disbursed entirely in ZEC tokens for the purchase of 9,000 Zcash ASIC miners, as well as capital expenditures such as the construction and…