Having the citizenship of another country may be necessary or convenient for a variety of reasons. For example:
Ease of Travel
Holding the passport of another country may enable a person to travel visa-free to a large number of other countries or it may make it easier for them to obtain visas to countries where visas are required.
In order to lawfully lessen the tax payable in their own country, a person may find it necessary or convenient to acquire the citizenship of another country.
Persons travelling in certain parts of the world are exposed to higher security risks if their native citizenship becomes known. In such a case, having the passport of another country might be a life saver.
There are certain countries where the risk of civil strife and a breakdown of law and order is a real possibility. Persons from these countries may wish to guarantee their physical and economic safety and that of their family by having a country to which they have the right to migrate if it becomes necessary to flee their native country.
There are many persons who, unfortunately, do not belong to any country. Such persons can seize the opportunity to become the citizen of a country for the first time.
Gateway to Migration
The ease of migration to certain countries such as the United States and Canada depends, in certain cases, on the country of citizenship of the applicant. A person can therefore improve their chances of migrating to such countries by changing their citizenship.