Collecting and trading can intersect, but to me they stem from different core mindsets ... ensuring that their choices not only align with their vision
but also make financial sense.
Interesting points ... though is the last part redundant?
That is, collecting is emotional and NEVER makes financial sense because there's never a rational reason to have the thing in the first place. e.g., unless your intention is investing / trading, there's no rational reason to buy & hold ("collect") a $5k+ time device.
The minute one allows "but I could always re-sell it for profit" or "it's worth more than I paid!" into the equation, as pleasing as that is, now they've compromised the collector emotions with the dopa hits of investing / trading, and once they do that they're not collecting.
The exception to those definitions might be someone who uses trading to fund collecting pieces they'd rather not or can't pay for, ie trades up to the big prize.
For example, they want to buy & hold forever ("collect") a Grönefeld so they use market data & instinct to buy a used Sinn and begin trading up with market trends until they can afford the new Grönefeld.
The pure collector might say, "my time if most valuable as a rocket scientist, so I'll use my income from that to fund my Grönefeld collection"
TLDR: "financial sense" for a pure collector might be "the price is right today to add that piece to my permanent collection & my kids can worry about market values after I'm gone since once I acquire it I don't care any more."
(note: this is purely fun discussion intended to make us all go hmm, nothing else)