Just days ahead of his return to the White House, President Trump and his wife, Melania, launched a pair of meme coins that have skyrocketed in value and earned them billions of dollars, at least on paper.

President Donald Trump promised crypto investors he’d usher in an era of legitimacy for an industry that’s long been relegated to the financial wilderness — dismissed by some mainstream investors as an highly speculative bet at best or an elaborate Ponzi scheme at worst.

Two Massachusetts Democrats sent a letter to various regulators asking them to open an investigation into President Trump’s and first lady Melania Trump’s recently launched meme coins.