British start-up Zilch is riding the "buy now, pay later" wave to America. : The London-based company said Wednesday it has raised $110 million in a fresh round of funding which values it at $2 billion — four times the $500 million Zilch was worth in its last private investment round eight months ago. The investment was led by Ventura Capital, a pre-IPO investor that has previously backed Alibaba and Spotify, and Gauss Ventures, an investor in London fintech firm Curve. Zilch plans to use the fresh cash to launch into the United States.