Watch This $1 Knife Slash Through a Ton of Stuff with Ease
If you sharpen any knife enough, you'll get an edge sharp enough to slice through things like butter. YouTuber JunsKitchen bought a simple $1 knife, sharpened it like crazy, and sliced through most of his kitchen. It even chopped off the tops of water bottles with ease. While such a cheap blade won't last long, but it was definitely fun to watch while it lasted.
If you're safe around knives, this is definitely something to try at home.