Every instrument I've owned has been gigged.
From my very first Hohner Arbor Series MXJ guitar to my Hyperbass. In the current stable I have other Zons, Marleaux, Status, Fender and (wait for it...) a Daisy Rock Butterfly bass!
I see no point in having them and not playing them.
And as I'm one of the much derided lawyers who are the ones apparently hoovering up high end basses for investments - all I can say is Bollocks. I've never met a colleague who has bought a new instrument as an investment. Ever.
HIgh end new instruments are not investments. They are merely luxury goods like Ferrari's and Saville Row suits.
It's up to the potential buyer to decide how they want to spend the money they have earned.
If a person wants a luxury item and can afford it, then that is a matter for them alone. If they can afford it, but don't like it then not buying it is a matter for them alone.
If a person can't afford it but desires to own it there seems to be 2 general reactions - to either make it an aspirational item, worthy of saving up and sacrificing other non-essential spending or they can bitch about how crap the item is, or how crap those who do have the means to buy it are.
Most amusingly, an awful lot of the people bitching have never been in the same room with a Fodera / Ritter / whatever. Let alone played one.