Question: how can i invest £200 with 100% return in 48hrs? 

Answer: That would be very tough to do indeed. If you want to do a little risk taking then you could go to a casino. One that has single zero roulette. Pick black or red, the previous number hits don't matter. Pick a color and then when the dealer has spun the ball, slap that cash on your color. The risk is that you may lose it all. If you win then you have made  your cash and walk away. You almost have a 50/50 chance of winning. The odds are slightly in the Houses favor with use of the zero. 100% risk and 100% reward.
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