The only people I know with guns are poor (possibly a coincidence). Are the guns themselves valuable enough to make confronting a gun wielding home owner worthwhile? Does saying you have a gun imply wealth? That's the part I'm not following? What is the actual reasoning?
The wealth of an individual has no bearing on the value of an item. Guns themselves are high value items. Easy to sell for several hundred dollars depending on the model.
High end guns can be sold for several thousand dollars.
More value and liquidity than a TV.
Not to mention ammunition is extremely liquid. It's used as currency in some countries.