Amid growing rumors that he may be considering ending his US presidential bid, independent presidential candidate Robert F. Kennedy Jr. has aggressively attacked Donald Trump in a speech in Nashville, attacking the former president over his plan to bolster the US dollar with a strategic reserve of Bitcoin.

Speaking less than 24 hours before Trump was scheduled to appear at the Bitcoin2024 conference at Nashville’s Music City Center, Kennedy praised Trump’s new evolution on digital currencies but remained skeptical of their legitimacy. “I know that tomorrow Trump will probably announce his plan to build a Bitcoin Fort Knox and allow the US government to buy a million Bitcoins as a strategic reserve asset,” Kennedy said. “I welcome President Trump’s new enthusiasm for Bitcoin. But he’s only been talking about Bitcoin for a few weeks,” he added.