Kevin Warsh sworn in as Federal Reserve chair after razor-thin 54-45 Senate confirmation. His openness to rate cuts and pro-Bitcoin stance could reshape crypto markets.

Never before has a chair of the US Federal Reserve been so controversial. Who is Kevin Warsh? Can he preserve the Fed's independence, or will he become Donald Trump's puppet?

Incoming Federal Reserve chair Kevin Warsh will be sworn in at the White House on Friday, taking the reins of the US central bank as it faces unprecedented pressure from President…