A zero coupon perpetual bond is obviously pointless. It's just a fancy way of saying "let's enter into a financial agreement where you pay me money and I will n

A zero coupon perpetual bond is obviously pointless. It's just a fancy way of saying "let's enter into a financial agreement where you pay me money and I will never pay you anything back, neither interest nor principal". The concept doesn't exist outside the author's head because there is no circumstance under which anyone would need the concept. If you want to give someone money and never get anything back, you don't need a bond. Cryptocurrency, on the other hand, is at least potentially valuable, if people find a way to use it to do real things. Which they have: for example, it is used extensively for remittances in countries with unreliable financial systems.