"Bitcoin is the only thing in the entire universe that we know for sure has a fixed total supply." The person who said this is Dr. Roman Yampolskiy, a pioneer in AI safety and author of over 100 papers on AI risks. His logic is simple: The 21 million cap is hardcoded into the system, and lost keys mean permanent disappearance. Satoshi's 1 million BTC remains untouched to this day. The amount that can actually circulate will only decrease over time. Now take gold, for example—who knows, maybe one day a pure gold asteroid will fly by, and the supply will collapse. As for concerns about quantum computers cracking Bitcoin—he says: quantum-resistant encryption solutions are already in the works, and quantum computers are still very weak for now. A top scholar who studies "how AI might end humanity" every day has only a few words to explain why he buys Bitcoin: truly scarce.