Stripping down just one or two computers is not gonna make you rich or make you much money but if you can get a whole bunch of scrap computers then stripping them down and extracting the motherboards, video cards, hard drives etc could make you a good salary.
But you need a lot of scrap computers to make it worthwhile.
Computers do contain some valuable metals such as Magnesium, Radium, Barium, Niobium, Osmium, Cobalt, Manganese, Titanium, Hafnium, Tungsten, Germanium, Gold, Silver, Copper, Mercury, Bismeth, Silicon, Gallium, Zinc, Iron, Sulfur, Phosphorus, Cadmium, Palladium, Tantalum, Platinum, Aluminum, Carbon, Lead, Nickel, Boron, Chromium, Potassium, Fancium, Casium, Sodium.
But there's really no safe way of extracting all of that precious metal unless you can safely use and get the chemicals which is not advised because the chemicals used to extract those precious metals can be deadly if not used correctly and the chemicals are also pretty expensive.