Other is pickpocket because you can get it easy 100 with abuse of saveplay. But let's agree you don't save at all. If you get cought, sometimes guards will all go attack and kill instantly without talking to you even. I just did test, I spent few times in jail, then got cought and bam I'm dead from stealing gold. It's frustrating, maybe I'm not doing it right or npcs are indeed too agressive.