Opportunity Cost — Economics
In Economics, opportunity cost is the the loss of potential gain from other alternatives when one alternative is chosen.
Every decision we make has an opportunity cost.
If I decide to spend $1000 to go on that cross crountry road trip I’ve always wanted to go on, that’s 1000$ that can potentially compound into $50,000 twenty years down the road .
Deciding to do a gap semester has an opportunity cost. Figuring out which essay topic to write about has an opportunity cost. Choosing which startup to invest in has an opportunity cost.
 Will Robbins talks about this in his piece, The Paradox of Compound Interest—which he argues that experience compounds as well.