The investing world provides way too many choices for you to turn a half million dollars into a million, and so the answer boils down to your risk tolerance and time horizon. The more time you allot, the easier it is to grow $500k into $1 million. A financial advisor would typically recommend investing regularly in a diversified portfolio of stocks, bonds, and alternative assets. With this advice, assuming that you earn 7.00% annually per year, it will take you roughly 10 years to double your money. If you choose a riskier assets, like cryptocurrency and technology stocks you might earn higher returns, and double your money more quickly, or suffer greater losses.