Invest - 10.0 BTC
Increase to - 30.0 BTC in one month
-->> this look quite spammy ..if this has case then all people in work will be millionaire in a year ..and doubling or tripling you bitcoin is quite difficultly other then you get jackpot in gambling
I understand how it sounds; that's why you're beginning with 0.1
BTC, in one month make 0.3
BTC, pocket the 0.1 you invested and invest in the remaining 0.2 the following month. When you earn 0.6, pocket 0.1 and reinvest in the 0.5. For the 0.5 investment you'll earn 1.5, pocket 0.5 and invest in 1 etc
It will take a number of months to hit there. As long as cryptocurrency will survive.