With $ 4,000 to double your amount, I think you should invest in Ethereum right now when Ethereum go down to $ 170 and it's go up $ 210. Is it enough to earn double your profits in 2 weeks ?
ETH will rise but there is no guarantee that it will double in 2 weeks, there is no such thing that is certain here in crypto.
I think if anyone wants to double his money, why not gamble on sports because in trading, it's hard to make it happen, unless you can luckily bet on pump and dump coins.