It all depends on the condition of the market, during the previous altszn, I was able to double some funds in just 2 days and that's by randomly choosing any coin within the top 20 on CMC and holding it for some hours, but things has changed right now, you cannot make money that way anymore and if you don't have any technical knowledge about trading, I would not advice you to try it unless you would just drive yourself deeper into debt when you end up losing all out of desperation.
I think it is difficult to make double profits in the market because not every coin can help you do this. In my opinion, you should only make a profit of 2% -5% daily and must control your capital. I personally am not good but always know how to make money when the market suddenly drops because it is a very good time to buy some coins and sell immediately when the market corrects. May be risk but I always set stop loss if the plan fails.