It sounds like you think it's unwise, but that's not quite the same thing as irrational. People make different decisions using different sets of information. I

It sounds like you think it's unwise, but that's not quite the same thing as irrational. People make different decisions using different sets of information. I have a significant portion of my savings as Bitcoin (much more than 1%). That decision was made through lots of close observation of the ecosystem, careful reading and thought. I'm very confident in the long-term growth of it, but I don't keep any month to month expense money as Bitcoin because of short-term volatility. You may disagree, but you can't characterize that as irrational.