3 Proven Ways to Double Your Money

We all would love to double our money, and there are lots of ways we might possibly do it, but they’re not all equally attractive. Winning a lottery jackpot may be the easiest, but it’s the least likely to work. The real estate market right now is hot, and you might be able to make a lot of money in it, but that can be risky, too. Cryptocurrencies such as Bitcoin are very popular, but they, too, are problematic.

One of the most rational ways to double your money is via the stock market. It likely won’t happen in a single year, but it can happen several times in your investing time frame.

Image source: Getty Images.

The table below shows how money can grow at a reasonable (but not guaranteed) annual rate of 8%:

Growing at 8% for

$5,000 Invested Annually

$10,000 Invested Annually

$15,000 Invested Annually

5 years




10 years




15 years




20 years




25 years



$1.2 million

30 years


$1.2 million

$1.8 million

35 years


$1.9 million

$2.8 million

40 years

$1.4 million

$2.8 million

$4.2 million

Calculations by author.

Here are three ways to go about doubling your money.

1. Growth stocks

Growth stocks are just what you might imagine they are — stocks of companies that are seeing relatively rapid increases in revenue, profits, and even profit margins. These companies are generally firing on all (or most) cylinders and have lots of investors very excited about their futures. The stocks will often seem overvalued (trading for more than their fair, or intrinsic, value), but growth investors will invest in them anyway.

Netflix has been a classic example of a growth stock, as has Amazon.com. It’s worth noting, though, that they haven’t soared in a straight line — each has had periods when its stock has declined.

Growth stocks, when they behave as expected or hoped, can double your money faster than other kinds of stocks. But they do often carry more risk than other stocks.

2. Value stocks

Growth investing has a counterpart — value investing. Value investors, like growth investors, naturally want their investments to grow in value, but they aren’t willing to ignore valuation. They aim to buy stocks for less than their intrinsic value, thereby building in a margin of safety. For example, if their research and number-crunching determines that Scruffy’s Chicken Shack (ticker: BUKBUK) is worth around $40 per share, they will not buy into it at $60 per share, but might do so at $30 per share.

Value stocks can also double your money, but it might take longer than with growth stocks. As a value investor, you might also need to exit some value stocks once they reach or exceed their intrinsic value, so that you can move the proceeds onto more undervalued stocks.

Image source: Getty Images.

3. Growth and value — the best of both worlds

If you ask me, it’s smart to consider aiming for the best of both worlds — combining growth and value investing. The two don’t need to always exclude each other, after all. A rapidly growing and wonderful business, for example, might also be undervalued on occasion. If so, that’s a terrific profit-making opportunity.

Imagine, for example, that Scruffy’s Chicken Shack has quadrupled in value over the past two years. Amazing, right? Is it undervalued or overvalued? Well, you can crunch a bunch of numbers and come up with a sense of how much of a bargain it is. Remember, though, that there’s no precise value of a company. All estimates are just that — estimates. Let’s say that Scruffy’s market value, its market capitalization, is $2 billion. The stock has surged from $500 million to $2 billion in short order. According to some valuation metrics, it may have gotten ahead of itself. But if the total chicken market that it might aim to win is worth $10 billion to $15 billion, there’s clearly room for more growth, if the company executes its strategy well. It might end up doubling in value in the coming years. So you could argue that it’s undervalued relative to where you expect it to be in the future. (Of course, if its current valuation were lower, there would be more to gain, and bigger profits to expect.)

Consider not sticking solely to the growth or value camp, but instead aiming to learn from both and seeking investments that might be both growing briskly and undervalued. Whatever you do, though, if you invest in wonderful, growing businesses and you hold on for many years (as long as you believe in them), you’re likely to do well in the stock market, and you stand a good chance of doubling your money — perhaps several times over.

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John Mackey, CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool’s board of directors. Selena Maranjian owns shares of Amazon and Netflix. The Motley Fool owns shares of and recommends Amazon, Bitcoin, and Netflix. The Motley Fool recommends the following options: long January 2022 $1,920 calls on Amazon and short January 2022 $1,940 calls on Amazon. The Motley Fool has a disclosure policy.

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