Not possible in the least unless you want to be scammed out of your bitcoin. 
It's possible if his going to do gambling activities and if he have luck and skills to do that then he can possibility double his bitcoin that fast and if not of course his going to regret because he wasted his money to gambling where there's no guarantee of winning and if he are going to invest then goodluck too.It would be a better choice to not to depend on gambling to double your coins, the probability of loosing would be definitely higher then winning and its not possible to be lucky every time.