A crypto billionaire is spending millions of dollars to reshape California politics and is ready to use his considerable clout and bank account to get embattled Democratic San Francisco Mayor London Breed reelected. 

Chris Larsen — a self-made businessman and angel investor best known for co-founding Silicon Valley startup Ripple Labs, which facilitates international payments for banks using blockchain technology, and online mortgage lender E-Loan — has become a huge player in city politics.