Because i can see your btc adress i know which amount i have to send back.
i will be keeping 0.0002 fee for the work that has to be done
invest 0.1 btc and get 0.5 btc in 24 hours
invest 0.1 btc and get 1.0 btc in 48 hours
invest 1 btc and get 1.5 btc in 24 hours
invest 1 btc and get 2 btc in 48 hours