Freelancing is the best option for making money in online in 2018.
We have different freelancing jobs in online like
Content writing
Blogging
Web design
Field engineer
web designing
Web development
Digital marketing etc.
I can't say that this is my source of income, but sometimes it helps me to get extra money. It's especially cool if I lack a little to buy something and while I put it off and decide to play a little slots I suddenly win the missing amount. In general, I believe that gambling can be a quick way to get some amount of money. For example, here https://pg-slot.world/ you can find additional bonuses and favorable conditions for your favorite slots. This also adds money to the winnings.