Most of the money isn’t “real” money
You might think that there are Scrooge McDuck-like vaults of paper and coins stored all over the world, but there isn’t. Over 90% of the world’s supply of money exists in digital form or is recorded in paper ledgers. Every stock market in the world transacts in over $80 trillion dollars. Unless the next global great depression is verified, there is enough money in the world to get through a stock market crash.