This is possible in bitcointalk well if you are legendary or sr member in here you can make that amount of bitcoin in just a few months well 2 months is enough tho.
They will just join in good quality campaign that makes money also that's the way they earn a lot of bitcoins in this industry.
Even if you are a high rank member and even if you are a part of good signature campaign it will take months for you to earn 1 btc only from signature campaign as with the increase in the price of bitcoins almost all campaigns have reduced their rates so you cannot expect to earn that amount from campaign in a quick time and you cannot also depend on it as you don't know how reliable the campaign is and how long it will survive.