bitcoin is famous,we have number sites to earn bitcoins without investment.we can search in internet.gambling sites also there.bitcoin is famous so number of sites using this bitcoin for fake.but take care while searching that sites.but i dnt know how is it possible.if it gives bitcoins it is super opportunity to all.if it is free of cost we can try this.
You will never earn guaranteed amount of bitcoins from gambling as most of the times you will be loosing your money in it so we cannot depend on gambling to earn money or bitcoins so its better to find the better ways of earning bitcoins which can give us fixed amount of bitcoins on regular basis.