Bitcoin BTC climbed above $68,000 on Wednesday as lower Treasury yields and renewed buying by large holders offered support to the cryptocurrency after months of weakness. Bitcoin gained about 5% over 24 hours to trade at $68,458, according to CoinGecko, reaching the level for the first time since June. The move came after the US Treasury announced plans to at least double the size of its bond buyback operations to $4 billion or more per operation. The announcement sent the 30-year Treasury yield down about eight basis points to 5.2%, with the 10-year yield also declining.