You don’t have to be a billionaire to benefit from a second passport. A second passport is a simple, but quite effective, way to increase one’s options and freedom of action. From Nick Giambruno at internationalman.com:
Before World War I, you didn’t need a passport for international travel.
People simply went wherever they wanted. In many cases, they didn’t need permission from any government agency.
Obviously, that’s not how it works today.
Today, governments use passports to document and control their citizens. In my view, the world would be better off without them.
Unfortunately, passports are not going away. You will continue to need one to travel, so you might as well have more than one.
Among other things, having a second passport allows you to invest, bank, travel, live and do business in places you wouldn’t otherwise be able to.
Further, a second passport prevents the government from locking you in. Without one, the government in your home country can effectively place you under house arrest by canceling your passport for whatever reason it wants.