Houses are useless as money because their value keeps changing and they're worth too much indivisibly. But we don't even try to use houses to buy a pizza, so th

Houses are useless as money because their value keeps changing and they're worth too much indivisibly. But we don't even try to use houses to buy a pizza, so that's okay. Digital money should be small enough to carry on your person, be divisible into small chunks, and its value should not wildly fluctuate from day to day. Bitcoin meets the first two of those criteria, but it violates the third. That makes it impossible to use Bitcoin to buy a pizza. (Although it did work for pizza for a brief time in the early days before its volatility became outrageous.)