How long will it take to turn 500k into 1 million?

Could you please clarify for me how long it might realistically take to transform an initial investment of 500,000 into a million? Given the volatile nature of the market and the various strategies available, what factors would primarily determine the timeline? Is it primarily dependent on the type of investment, the market conditions, or perhaps a combination of both? Additionally, are there any general guidelines or benchmarks that investors typically refer to when estimating such a timeframe? Thank you for your insights into this intriguing question.