Fortress is now offering creditors a "premium price tier" of $1,300 on every bitcoin held by the defunct exchange's estate.
Former Mt Gox customers can recoup $900 per bitcoin owed by selling their claims to Fortress Investment Group.
A hedge fund billionaire reportedly called bitcoin and ether the "best investments" of his storied career at an event on Wednesday.
The human capital heading into bitcoin gives the Fortress Investment Group CIO confidence in the cryptocurrency, he says.
Four major investment firms have teamed up to launch a bitcoin investment fund.
Top bitcoin exchange Bitstamp received $10m from hedge fund Pantera Capital Management last year, Bloomberg has claimed.
Helmed by Lemon founder Wences Casares, Xapo raised $20m as part of its first funding round.
According to a SEC regulatory filing, Fortress Investment Group reported a $3,702,000 loss on its bitcoin investments.