The only way to earn bitcoins fast is from gambling but there is very high risk involved in it and if you can afford to take that risk then you can go for it, as its your money you can do anything that you want.
Sir ,i am not interested in gambling where there is not guaranty of income.Please tell me if is there is any business where getting BITCOINS with minimum risk ,But getting considerable earning doing even doing hard work.
If you want to earn bitcoin then the safest way to earn coins is signature campaign and social media campaign, you can easily earn from that campaigns and risk rate is zero. You can also earn by doing some tasks like video editing, article writting, captcha filling etc. The best way to get bitcoins is trading but for that you need an initial investment so first join campaigns for getting coins.