Internal and physical investment : The story of an inverster and a public speaker

John started his career as an electrician in a construction company.
Throughout the years and thanks to frugal living, he managed to scrape together a deposit for a house.
After acquiring the house and handling the initial fees, he rented it out.
A portion of the rent was set aside to acquire a new house.
After a long, and arduous effort that lasted for years, he become the owner of three residences and could afford to retire comfortably at an early age.

Albert started theatre at an early age. Combined with a avidity for reading classics and poetry, he managed to develop an unusual ability for speaking.

Ha started giving speeches at his school for different events and occasions. This nascent ability, through assiduous reading and frequent speech delivery, morphed quickly into full-fledged professional ability that people were willing to pay for.
Both the above physical investment and the "internal" investment are great ways to generate value for others and generate wealth.
The first one necessitates a sizable upfront investment, can't be relocated geographically, and incurs lot of expenses.
The second one requires a minimal investment, can easily cross borders as it follows with us wherever we go, ready to serve our goals.