Gold will surge to fresh highs in the next year, but investors seeking currency alternatives as global debt balloons should look to Bitcoin, according to a $7.5 billion hedge fund. Both are likely to rally even as the Federal Reserve moves to taper asset purchases, said Troy Gayeski, co-chief investment officer and senior portfolio manager at SkyBridge Capital. The two are frequently compared by investors, with former Treasury Secretary Lawrence Summers saying cryptocurrencies could stay a feature of global markets as something akin to digital gold.