Hi, new here, obsessed with travel, and admire people like Lexie Limitless and Drew Binsky who have traveled so extensively and seen all the countries of the world. I may not plan to see EVERY single country, but I want to see 100 to 120 countries in my lifetime.
Seen 18 Countries, Aiming to see over 100 countries
Suggest you accomplish your travel goals gradually over time. You'll find it more rewarding. Create a list of places you want to visit. Then use it to help motivate you. I use the lists of the Travelers' Century Club and NomadMania. Some narrow their focus even further (for example, visiting every UNESCO World Heritage Site, every world capital, every national park).
"... I want to see 100 to 120 countries in my lifetime.'
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More difficult to visit so many places and hold down a real job! Win a huge lottery, have generous parents who pay for everything or have other legal sources of money is helpful. If you work for someone at home your employer may not accept lengthy frequent periods away from work.
Up to you.