If you are earning 40$ per day then why not try to start a lending service?
Lending service is a very risky thing to do. There are some that would give you a valid collateral, but upon checking, the collateral actually has hidden defects. And a lot of people are asking for a loan and would just default because they didn't care about their collateral. Their intention right from the start was to get rid of that item or to sell that item.
You'll see lenders in here are very picky on whom they give loans to.