I would consider selling things that I don't need, or that are not very important for me in my daily life. Then I would use part of the earned money to invest in something with potential to give me profit.
Yes its a wise idea than to borrow money to someone with interest. i would also sell the things that is not really important, but to prevent that scenario its better to start saving so you will have money to spend incase you badly need it.
yeah of course you have to do when you run out of money is to sell unused items, when you've sold it, and you still need more money you can start selling valuable items that may be sold. I hope it can meet the needs of your money at that time