Everything is resource allocation

To become great at anything one of the underlying skills you're developing is resource allocation.

Examples:

In chess: If you're playing chess and you spend too many on your pieces focused on an attack, it can lead you vulnerable to your opponent. The attack is only worthy, if you know you can expend that many resources without exposing yourself.

In product management: Way too many features are scraped or never widely used. If the value proposition is not clear, allocating resources to that feature is premature.

In sales: pareto's principle would say 20% of customers make 80% of the profits, how can you spend more time nuturing the 20%? Are there commonalities in the most valuable customers? Where to allocate resources is key.

As an investor you're trying to weigh your investments, against themselves and against the rest of your portfolio.