"Quantum computing stocks fell sharply on Wednesday after Nvidia CEO Jensen Huang stated that practical use of the technology is likely 15 to 30 years away. Rigetti Computing and quantum computing shares dropped more than 17 percent, while IonQ and D-Wave Quantum fell 9.4 percent and 14 percent, respectively. Despite projected growth of the U.S. Quantum computing market from $138.2 million in 2022 to $1.2 billion by 2030, practical applications remain distant. Jim Cramer noted that long development timelines and current market valuations are raising concerns for investors."