When you buy something, it requires much of you. You must take care of it, you must maintain it, you must use it.
You don’t want to just store it, or have it collect dust somewhere. And if it does become unused, you’re gonna one day figure out what to do with it — to throw it away, give it away, or sell it. All require much work. Throwing away (mental, emotional, sentimental guilt). Giving it away — deterring a “worthy” recipient. Selling it — the stress finding a buyer, using time, and coordinating it all, and also getting a fair price.
Be extremely selective and picky about what you buy and admit into your life. Only buy what you can imagine using for an eternity.
Invest more money in yourself and experiences. Invest in metaphysical things. Good thing about buying experiences— you store them in your heart and memory, not your garage! You can infinitely hoard memories and experiences inside your mind.