Bitcoin and Ethereum experienced significant rebounds as optimism grew over the resolution of the U.S. government shutdown. Bitcoin climbed 4.2% to $106,269, while Ethereum increased by 7.4% to $3,643, according to CoinDesk market data. This positive movement follows a bipartisan agreement reached by Senate negotiators to fund the government through January 30, reversing recent federal layoffs and ensuring a December vote on extending Affordable Care Act tax credits. Despite the positive market sentiment, traders remain cautious about the likelihood of the SEC approving a Cardano ETF by year-end, with the probability dropping to 38% from 90% a month ago. The developments have lifted risk sentiment after a volatile week in the cryptocurrency markets.