I have many questions to ask, but for the time being I need you to answer this question:

In case you lose. you will charge 50% of your fee?

In case you make a 10% profit, you will charge 50% of your fee, right?

Basically. The person invested 0.1 and you had a profit of 10% = 0.01BTC, your share would be 0.005BTC and the investor would make a profit of 0.005BTC. right?