There is another investment option, although I never made money at it, never lost much either, are moneypot sites. Moneypot itself is one, but there are others. Imagine you are ready to open a gambling site, but lack the capital to back large client bets. You know that any casino site slowly makes revenue, but a large bet could kill you. Moneypot allows others to pool their funds into a large pot that backs gambling sites. You deposit X BTC or other coins and your deposit combines with others to back the casino. Moneypot, the site, does nothing but back sites, without true casino games of their own. Other sites use your funds for only their site.
I never put in more than half a bitcoin and saw a very small return, sometimes a tiny loss. Most of these sites give you the option to margin your deposit as a larger investment, meaning that if you deposit 1 BTC, you can tell the site to act as though you have put into 10 BTC. This increases your risk and your potential return. I was ready to invest more, but literally the account just hovered very close to the deposit I made, never much up, never much down. But, it is an option for you.
Also, look at sites like btcpop. It is very confusing, but one of the options is to loan your deposited BTC to other members, long term and short. The users are rated in various ways and a lot of info is given that can help you choose who to loan too.
Last thought, you can also try a POS coin that has become fairly trusted. POS is proof of stake and the coin returns a dividend to you based on various rules. You simply download the software wallet, exchange your fiat or BTC for that coin and move them to the software wallet and follow the rules. These rules may include the balance being in there a certain number of days, being above a certain balance or many others that the dev has set. The newer the coin, the higher the payouts, most likely, and the higher the risk. Also, read the rules carefully, many POS wallets only accrue "interest" if the wallet software is running.
In my opinion your options could give only a tiny returns and risk is much higher than possible profits. Having 40 USD per day the best choice is to learn trading techniques and earn money this way. The risk would be similar to lending your BTC but returns coul be much higher.