My greatest fear is that one day I will die...
And my wife will sell my guns for what I told her I paid for them.
Same applies to tools
My wife surprised me one day while we were at the hardware store to buy some shelf brackets and then wandered to the tool section. She said "every new project is an opportunity for a new tool." She understands!
We don't hide any of our purchases from each other, and she no longer rolls her eyes when she sees me unloading a new box from the back of the truck. She knows how much everything in my shops cost, but doesn't necessarily appreciate the value. To help when I eventually pop my clogs, I maintain "The Envelope" in a location known only to her. It is unlikely that she will take up any of my hobbies, so The Envelope has a list of previously coordinated contacts to assist her in liquidating my tools and equipment so she doesn't have to worry too much about it or be concerned that someone will offer her a few hundred Euros to haul everything away. I keep the receipts for every significant tool I buy, so she will have the documentation to assist with the liquidation.