When Edwin Castro stepped out of the shadows as the winner of the largest Powerball jackpot in US history, he stayed mostly quiet — letting his new multimillion-dollar homes and collection of vintage Porsches do the talking. But in the wildfire-ravaged hills of Altadena, California, the quiet didn’t last. Castro, who won a record $2 billion Powerball jackpot, has spent roughly $10 million buying up 15 fire-scorched properties in his hometown of Altadena, with plans to rebuild homes where