Success strategy for our century
Addition: you dont have to own any subject or tools other than those in your choosen area of specialization, but just know what is out there and find out how to acquire them.
How far should you specialize and narrow your area of specialization? Until you can aim to become the top 10 in this world in your choosen field.
Keep asking yourself, what is most important to me in this hour, this day, this week, this month, this year, these 2 years, these 3 years, these 5 years.
Only the most important thing should matter, and that thing, to borrow from Marie Kondo, must spark joy in you. Then discard all the rest and focus yourself fully on the most important.