Bitcoin rises to the highest since May, is now up 30% in OctoberBitcoin rose above $57,000 Monday morning, extending its two-week rally.The cryptocurrency gained more than 3% Monday to reach $57,597.60, the highest level since early May, according to Coin Metrics. Ether added nearly 2% to $3,599.22.The comeback — a gain of another 12% would take it back to its all-time high of about $65,000 — comes amid increasing hopes and expectations that a bitcoin futures ETF could be approved soon, as well as recent comments from the heads of the Federal Reserve and Securities and Exchange Commission, who said they have no intention to ban bitcoin, which seemed to “embolden” investors, Ned Davis Research noted.NDR’s Pat Tschosik noted that bitcoin and gold’s one-year correlation has been dropping to t