Quantum computing is becoming more affordable and demand is rising due to AI and cloud computing. McKinsey predicts revenue for the sector could grow from $4 billion in 2024 to $72 billion by 2035. Since the technology is still early, the article suggests ETFs might be safer than individual stock picking. The Defiance Quantum ETF (QTUM) is the largest with $3.2 billion in assets and a 0.40% expense ratio. It holds around 80 stocks, mostly in semiconductors and software. WisdomTree also launched a competing fund recently. For specific companies, IonQ is mentioned as a pure-play option, though it is currently losing money. Honeywell also has exposure through its majority ownership of Quantinuum.