The National Basketball Association (NBA) faces legal challenges over its marketing partnerships with now-defunct cryptocurrency platforms Voyager Digital and FTX, with allegations of gross negligence leading to significant investor losses.

A lawsuit filed in the U.S. District Court in Southern Florida targets the NBA's promotional endeavors, particularly its deal with Voyager Digital through the Dallas Mavericks, which plaintiffs claim resulted in approximately $4.2 billion in damages.

The NBA's involvement with Voyager Digital, notably endorsed by former Dallas Mavericks owner Mark Cuban, is under scrutiny for promoting what plaintiffs describe as "unregistered securities." Cuban, who had previously been sued for his promotion of Voyager's products, is accused alongside Voyager CEO Stephen Ehrlich of misleading investors, leading to substantial financial losses.

Voyager Digital's bankruptcy in July 2022 followed its exposure to the collapse of the crypto hedge fund Three Arrows Capital (3AC). Subsequently, the Commodity Futures Trading Commission (CFTC) initiated legal action against Ehrlich for fraud and regulatory violations, criticizing the platform's false representation as a secure investment option.

The lawsuit extends its accusations to the NBA's broader engagement with the cryptocurrency sector, highlighting its partnership with FTX for the naming rights of the Miami Heat's arena. The swift approval of this sponsorship by the NBA is cited as a critical factor in the widespread adoption and eventual downfall of cryptocurrency investments. Following FTX's collapse, the Miami Heat terminated its $135-million naming rights agreement with the exchange, which was led by the now-discredited crypto figure Sam Bankman-Fried.

These legal proceedings underscore the NBA's controversial foray into cryptocurrency sponsorships, raising questions about the due diligence and risk assessment conducted by the league in its promotional activities. As the cases unfold, the NBA's role in the tumultuous world of digital assets remains a focal point of investor grievances and regulatory scrutiny.