Prune
Take your greatest treasure, hold a knife nice and close to it, and prune away all the weak and dead bits.
All treasures need to be taken care of, no matter what they are. Prune away anything that isn't necessary.
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Currently, you want to prune your greatest treasure: your car (か). Your car is made of wood, and it keeps trying to grow new buds and branches, so you have to prune them off.
You want your car to be small and sleek, not a giant truck, so you have to carefully prune it when it grows too much.