If those are going to be something that you have any role in directing or you know what the investments are, then yes, you would have to do that.
Konrad von Finckenstein said that this was going to cause a huge tax hit or tax implications. The better way to solve that is to give exemptions from those tax hits for people who enter public office. That would actually be an incentive to serve the public.
As long as you allow financial investments, you are allowing financial conflicts of interest. There is no other way of stopping it. That's why it was recommended in 1984 and 1987 as the solution.