The first thing I would ask you is what you define as a tax haven. The colloquial term for that means taxes can be deferred to a later date when the asset is dispossessed and the gain is actually realized. Another way of looking at it is a jurisdiction that has a lower rate of tax based on income or whatever the threshold test in that jurisdiction is for generating income.
Individual citizens and individual corporations should organize their affairs in ways that seek to minimize their own taxes, if that is consistent with the laws of the jurisdiction in which they are operating—