Which strategy builds massive wealth the fastest?

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I have either read on the forum or heard in the podcast that you choose your strategy based on your goal(s). I.e. Rentals create passive income and wealth in the long run vs. rehabbing which has large payoffs in a shorter amount of time but doesn't have the tax or appreciation benefits that buy and hold does. My question is which strategy builds massive wealth the fastest? I do not mean a get rich quick thing - for example I figure if you raise enough capital from investors and you keep your living expenses low, you can snowball your returns, with each year being able to flip more and more houses. You also have success stories like Lance Wakefield. And then you have the real estate billionaires which seem to be developers for the most part - so would real estate developing be the answer?