Popular quantum computing stocks Rigetti and D-Wave trade at nonsensical valuations.Certain artificial intelligence (AI) stocks -- chief among them Palantir Technologies -- currently trade at absurd valuations. But Palantir looks cheap compared to popular quantum computing stocks Rigetti Computing (RGTI 3.87%) and D-Wave Quantum (QBTS 6.45%). Their share prices have increased 3,500% and 1,700%, respectively, since January 2023.I expect both stocks to crash next year when the quantum computing bubble inevita ...