Your app is on a kind of privacy/security middle ground because the portfolio data seems to not be client-side encrypted, which is something privacy conscious users look for.
At the same time I understand data entry is manual?
If I'm going to go through this trouble I would rather have the whole privacy package keep my consolidated portfolio information to myself (which I know is valuable, actionable information. There's a reason most portfolio apps are free without ads).
Overall, I think your landing page doesn't sell your product really well. There are already many portfolio apps. If the big advantage of your app is the breadth of the investment types it support, this should be emphasized more.