in my case; I have to work 50 days without eating or paying the rent or 17 months if I save 10% of my salary to invest in BTC. it's too long for a single coin.
Actually don't mind it, but i think your salary is very low, that's why you have a lot of time to make one bitcoin, So i advise you to do work continuously than hope so you can earn fastly.
About OP when i started work with bitcoin since when and now in that time, i have earned 3 bitcoins from my investment' s amount, i mean 3 bitcoins that's all my profit, but in the start i have work very hard to earn the bitcoins because i didn't know very well about bitcoins.