The US government reopens after the longest-ever shutdown, coinciding with a rally in the TRX price and XRP price. Are these the most promising altcoins to buy in Q4? Meanwhile, Digitap ($TAP), an up-and-coming DeFi-TradFi coin, made headlines with significant gain. Considered the best crypto to buy now, it enables users to spend digital assets like cash while championing true financial anonymity.