You can always make money online. I make money online, some of my friends make money online and thousands upon thousands of people make money online each and everyday. It all depends on how much money you need to make online. If you want to make a living doing this...well it takes discipline.. you have to have a schedule each day, don't start without a schedule, that's a big mistake people make, you get caught in your everyday routine and never get out. Also, make darn sure you ready for this type of change, it's not fun someday's and someday's it's a blast
For example: One quick way to make money, is to find a target market and focus on that market. Learn that market, find out what that market is doing every day, find out how much income that market is making, you can even get into some advanced marketing techniques (demographics, age groups, married, children, frequented websites, etc...). When you find this information out about your market, you can then start a promotion campaign (ads, email marketing, solo ads, and hundreds more..)
If you stay focused, you can definitely make money online...but alot of people try one thing, and go on to the next.. and that doesn't get them anywhere, except for back to the starting block...
Then again, If you are just trying to make a few bucks part time online, a good way is fiverr - start a gig for $5.00 and see what happens. If you've got a good idea, it'll add up.