How do you define a ‘keeper’ vs. an investment in your box?

Hey everyone, Alex here. I’ve been revisiting how I categorize the watches in my own box—what I call Keepers, Growers, and Traders—and it’s changed the way I buy. My Speedmaster 1861 is a Keeper: it’s the watch I reach for when I need quiet confidence, and I’ll accept market dips because the return is personal. A Hamilton Khaki Field Mechanical is a Grower for me—easy to service, forever wearable, and there’s always a buyer when the price is right. On the Trader side, I’ve experimented with a Baltic Aquascaphe and a Formex Essence 39; both taught me that strong spec sheets plus real community interest can keep a healthy floor under value. What’s surprised me lately is how much completeness and documentation matter. Full links, service notes, even the hangtag—these small things widen your exit lanes and make negotiations pleasant. And I’m more movement-conscious than I used to be: Sellita SW200-1 or Miyota 9039 means I’m not sweating future service. Curious how you draw your own lines. Which watches are untouchable in your collection, and which are positioned to rotate when the right opportunity knocks? More importantly, why?