Payment obfuscation (which is not inherent in the protocol, but how you use it). International money transfers. I've personally met a few backpackers who use

Payment obfuscation (which is not inherent in the protocol, but how you use it). International money transfers. I've personally met a few backpackers who use bitcoin ATMs in SE Asia in addition to the traditional banking system. FWIW I suspect that these use cases are negligible compared to speculation.