If I have 0$ at the moment can I make 100$ in 2 or 3 months? How?
What if I deposited 20$ .. Can I make them 100$ in less time?
It possible even you dont have money you can earn that $100 in no time if you have skills regarding developing,technical,programming,designing skills you would able to generate that money by finding jobs on this forum but if you dont have skills then it would be hard. Using $20 doesnt guarantee to make you $100,if you could able to risk that on playing gambling then its your choice.
if you have a mining rig absolutely you will have more than you are expecting without hesitation. you need only to have a high specs pc and we need to be patient enough , you dont need an investment here onyl patience.