Several of Wall Street's savviest billionaire money managers purchased this stock during the September-ended quarter.Although artificial intelligence (AI) has been Wall Street's hottest multiyear trend, it took a backseat to an even more-hyped technology in 2025: quantum computing.Quantum computing pure-play stocks IonQ (IONQ +3.17%), Rigetti Computing (RGTI +0.34%), D-Wave Quantum (QBTS +5.09%), and Quantum Computing Inc. (QUBT +1.36%) have respectively surged by as much as 810% over the trailing year, as ...