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If you answered "No" to Question 3g, fully describe how you are supporting yourself on the attached page entitled "Part 4.Include the source, amount, and basis for any income.

我要写明investment具体干什么，赚多少钱吗？
-You may not need to report this investment in the I-539 because your spouse's income is enough to support you. You need to enclose your spouse H-1 approval notice with the H-1 I-94 and his latest 3 month paycheck stubs, thus USCIS will know your support is from your spouse..

Your investment is irrelevant to H-4, but you just need to pay the income tax only.