I don't exactly know if the name for them is still "gamblers" but depending on the game that they play, their strategies, their experience and their intelligence, some people are able to get an income and even make a living from gambling. Some people spend their time playing Hold'em against tourists in Las Vegas, for instance.
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Yeah I think many of them earning a living with gambling, I wonder how can they manage to do that as it requires great level of skills and expertise to do that and ofcourse the courage to take risk.
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Well yeah I just google around and actually these people aren't called gamblers but rounders. The difference is that the gambler is taking a risk (and thus he loses), while the rounder is using mathematical stuff such as probabilities to back his reasoning and his strategy (so that he wins overall). I could have guessed it from the name of the movie Rounders though, and I had thought about it but yeah, I wanted to double confirm.

so we need time machine to go back on 2009?if i have that machine,i think i will not go back to 2009,i will back to 2010,and its time to buy as much as i can,then sell it when 2013 or 2014 come

LOL very good idea
Unfortunately, it's not possible to do something like this.
It's true, however, that people who placed their trust in Satoshi and his Bitcoin project back in 2010 and invested some money in it, now they already made very big profit.
Something like this is not possible any more, at least not with Bitcoin.
Sorry guys, most of us came late for this party

If such a time machine comes to reality, you will never be profited much because the expense to travel to the past will be more expensive than the profit you earn on buying at the price of 2010.

but it is totally impossible and possible only in our dreams, we have to think about that procedures which are related to the reality which are really good in earning some bitcoin and can give us an opportunity to earn our living and support our family with that.

Signature campaign is really good to earn btc, and there are many other ways too, if you want to multiply your coins in quick time then you can go for trading.

Exactly and that is the mistake that everyone does at the initial stage to multiply their coins in a quick time, but at the end of the day you come to know that you have been cheated and you loose your hard earned coins.

There are few games in gambling that requires skill or knowledge of that particular game but majority of times it depends only on luck and you cannot be lucky everytime.

Signature campaign,  trading,  and gambling this three is the enormous ways to earn bitcoins.