This quantum computing specialist is a highly speculative investment.IonQ (IONQ -0.80%) is one of the most popular pure-play quantum computing companies available for investment. The stock has risen an incredible 479% over the past year, but after its steep surge in the latter half of 2024, it stalled. It's currently trading a few percentage points below the all-time high it reached at the start of 2025. However, IonQ is one announcement away from another surge that could lift the stock to new highs, which ...