There are few possibilities at the moment,
and it seems that as time goes by it becomes harder to get that amount in a short period of time.
A few years ago, for example, the best way was mining. At the moment, I think trading is the way.
To get that return in a month, you'll probably need a high initial investment.
To get such gains in two months, then the necessary investment will certainly be something more moderate.
The most important thing, IMO, is the knowledge of the market, that's necessary to make better decisions,
and it's also necessary an understanding of techniques that make it possible to perform the trades efficiently, at the right time.