You trade three different strategies - do I have to invest in all of them?
No, you can choose to invest in as many strategies as you deem appropriate for your risk profile. We always recommend diversification across a range of strategies and geographies, and that is why we choose the strategies we trade. Diversification is a tried and true technique for reducing risk by spreading your investment over a number of different assets.
The value of different assets can rise and fall at different times. By diversifying, you reduce the likelihood of any single investment or asset damaging the value of your entire portfolio. Remember that the Renting Stocks, Options Plus and FX Option portfolios all have different 'purposes': Renting Stocks is for generating a regular income whilst being highly protected, Options Plus is a more aggressive strategy for short term profits, and FX Options is the most aggressive by trading global foreign exchanges. As such, using all strategies is preferable over just one.
As always, whether you choose to trade one, two or all three is a choice only you can make - and that choice must suit your personal investment and risk profile.