Key Points Quantum computing currently has limited practical applications and is prone to error. IonQ, Rigetti, and D-Wave are unprofitable, and their expenses are rising. Buying these stocks now means you're paying a premium for an unproven market. 10 stocks we like better than IonQ › Quantum computing has quickly become one of the most popular technologies to invest in after artificial intelligence. Just take a look at the share price gains of some of the biggest names in the industry -- IonQ ( ...