A friend of mine earns almost a grand or so dollars on bitcoin. Over the time he has invested in bitcoin he's made a lot of contacts... And he just sits for an hour or two at most per day and earns the above mentioned sum.
Yeah, it require some tricks to earn a large number of bitcoins on Internet from available opportunities, of which I think a lot of people not aware, or they only stick to a specific way of earning and do not proceed with it.
it is not tricks there are a lot of known ways of earning on the internet but it doesn't mean that everybody can earn through them.
for example there is the well known earning through advertising like banner ads on a site with good traffic, there are affiliate marketing and a lot of SEO work with a lot of money.
I think these are tricks, that is why not all the people are able to earn with that, I have saw some people who can earn about dozens of bitcoin with only one way of earnings wher other can earn only a half of bitcoin with hard struggle.