Tether CEO Paolo Ardoino posted a lengthy diatribe to X on Monday in an apparent effort to rail against any notions that his company's stablecoin is insecure in any way.

"An uniformed CEO, leading a company being investigated by the SEC, launching a competitive stablecoin ... is being reported spreading fear about USDT," Ardoino said in his post.

Ardoino failed to name the CEO in question, but all signs appear to point to Ripple CEO Brad Garlinghouse. Ripple is engaged in a lawsuit with the Securities and Exchange Commission and also recently announced it would be launching its own stablecoin, which will be in direct competition with Tether's USDT coin, the world's largest by market share.

Garlinghouse, while speaking on a podcast posted to YouTube last Thursday, said: "The U.S. …