Victims of an alleged $328 million cryptocurrency Ponzi scheme have filed a class-action lawsuit against JPMorgan Chase & Co, accusing the bank of ignoring repeated red flags and compliance warnings while its accounts were used to process hundreds of millions of dollars tied to the fraud. The complaint, filed in U.S. federal court, alleges that JPMorgan “turned a blind eye” to suspicious activity linked to Florida-based Goliath Ventures, a crypto firm accused of defrauding over 2,000 investors with promises of high returns, and continued to service accounts involved in the scheme, earning…