Doubling your money in a year is not an easy feat, and if possible, it would likely come with some level of risk due to its very high reward. There are an array of investment vehicles that are speculative where you may achieve this level of return in such a short hold period, such as investment in stocks or cryptocurrencies. Commercial real estate investing and multifamily as an asset classallowsw investors to double their money every 5-7 years while having a significant tax shelter to those earnings, unlike in stocks and cryptocurrencies.