The “1m” goal, but with a nice head start?

Hello all, like the title implies, I’m looking to hear different views on how to reach the 1 million dollar goal. This is just for fun as I’m curious what others move would be.

Let’s say for the sake of this argument that I have 500k cash that I want to turn into 1m+ as quickly as possible. Own my home and car, no debt and my job salary covers all living expenses.

I think the standard response would be out it into etfs and wait a couple years. But what if the goal is as fast as possible? Could be risky plays, angel investing etc

Crypto? Start a business? Sp500 and wait? Gamble? Day trade? Etc