AFP/Getty Images Bitcoin prices fell as bitcoin cash prices surged over the weekend.Bitcoin and its sister cryptocurrency, bitcoin cash, took a wild ride over the weekend, with price swings topping 15% and bitcoin cash briefly overtaking Ethereum as the second-most valuable digital currency. Bitcoin prices BTCUSD, +6.50% plunged 15% Saturday, from $6,500 to a low of $5,507, then bounced back to around $6,400, then fell again Sunday by more than 9%, to $5,799 by Sunday evening, according to CoinMarketCap.com. Last week, bitcoin had risen to another all-time high, peaking above 7,800. Meanwhile, bitcoin cash, which was created by a split from bitcoin over the summer, surged late Saturday and topped out at record high near $2,500 early Sunday morning — topping Ethereum’s $29 billion market cap — before crashing about 50% to $1,224. But it quickly recovered and was at $1,539 Sunday evening, up almost 16% from the end of the previous day. The currency had largely traded around $300 to $500 since launching in July.via