World's fastest man races a bus during visit to Argentinian capital

The video tutorial begins with an introduction mentioning Paragon Marine and Mama Flora. It then includes a brief greeting to Michael, followed by a discussion on uncertainty and the concept of building or planning for the future, metaphorically described as 'building a few around the corner.'

What can be inferred from the statement 'Never really know. Building a few around the corner.'?

How do the phrases in the text connect to each other thematically?