Seeking other sources of income, like securing a side job or starting a business, would be good options if you want to save. Saving would later be channeled to investments such as real estate, Bitcoin, or precious stones.
Having other sources of income surely makes saving and investing easier, that way one would have enough for their daily expenses and something left for investments. However, there is something i read and i believe it to be true, if you cannot save from the little you earn, you would probably struggle to save even if your salary increases. Many people who became successful investors started investing when they had little, they believed in compound interest and they started very early.