The investment strategy is individual for each investor. In the case of a desire to maximize profits, it is necessary to understand that greater profitability carries greater risk.
Where to invest small amounts of money?
First of all, you can invest them in real estate. For example, to buy an apartment and rent it out. This can become an additional source of income for a long time.
You can open an AIS (individual investment account).
You can take out a mortgage and rent an apartment, the mortgage is extinguished with the proceeds, but it is important to take into account all the risks.