Last but not least, you can also earn money online by building an online community, although the monetization strategies you can pursue will vary a lot depending on your goals. You can build a community with a blog, for example. You can also build an online forum and charge people for membership. You could even build up a Facebook group and use your influence there to sell and promote products.
Banks can lend the new deposits or invest them in other ways because most of this new money comes to lenders above the minimum reserve amount. Lenders then earn money on the interest for loans and deposit money into other bank accounts. Borrowers spend the loans on whatever they choose, which, in turn, stimulates other economic activities. The process continues indefinitely until such time the Federal Reserve decides to tighten monetary policy.
Buy underpriced used books. Outfit a phone with an ISBN reading app, scan the ISBN numbers of books at used bookstores and thrift shops, and compare the asking prices with what the books are selling for on a site like Amazon. Whenever you get a good hit (which won’t be often but, since the process is fast, won’t take long, either), buy the book and resell it online. Be discreet about this, as the store managers probably won’t like what you’re doing.