Ripple CEO Walks Back Threat to Leave US News Prolonged but fruitless efforts to get regulators on the firm’s side seem to have exhausted Ripple’s patience as it eyes a potential IPO and fights a lawsuit. More courses:JPMorgan, UBS, and Goldman Sachs Back Polkadot (DOT)…More Aussies Back Bitcoin, the UnderdogSEC Chair Jay Clayton to Leave the Commission by…