However, that's a big "if." Quantum computing is still an early-stage technology, and the companies involved are generating little revenue. For instance, IonQ has a $16 billion market cap, but it guided for a top line of$106 million to $110 million in 2025. That gives it a sky-high price-to-sales ratio of 145. Meanwhile, it's expecting to report a loss of$206 million to $216 million for the year. It will need to perform perfectly from here for many years just to justify its current valuation. Rigetti and ...