try altcoin trading, 20$ btc is enough to start trading altcoin...buy altcoins that are good and sell it to higher price
yeah i think that might be the easiest way of making money with bitcoins as the cryptomarket is unregulated and you can do there nearly whatever you want in my opinion
also you might try making some bitcoin to fiat trading, if you will be lucky it will also allow you to make some decent money in my opinion and that will be really great i think
Yes trading is the best option as it will allow you to make some good profits over a period of time if you can handle the trades smartly.