Tiger Global, a U.K. hedge fund that invests mainly in global consumer brands, is reportedly considering a $500 million investment in Coinbase, which would boost the startup’s valuation close to $8 billion and strengthen the cryptocurrency market’s legitimacy, according to sources that spoke to Recode. The investment would make Coinbase one of the highest valued U.S. startups. The investment in part would buy out existing shareholders, although the specific numbers have not been determined. Last summer, Coinbase was valued at close to $1.5 billion.