The most important thing in investing is choosing the right place to invest money. You can invest your money in three major places: saving accounts, stocks, and bonds. And you should choose one or all of these according to your preferences and investing goals. For example, if you don't want to lose your money quickly, then put it in a savings account but if you want more than that, then put it in the stock market or bonds market (you might lose some, but you might gain some). The most famous investment strategy is "dollar cost averaging." I've learned it from https://www.humaninvesting.com/retirement-plan-services.