There are many Bitcoin exchanges and "banks" where you can buy USD for Bitcoin from someone looking to buy Bitcoin. Currently, about $70 million per day - $bill

There are many Bitcoin exchanges and "banks" where you can buy USD for Bitcoin from someone looking to buy Bitcoin. Currently, about $70 million per day - $billions per month - is exchanged for Bitcoin, so it's easy to get in or out of it. > hence it sounds like the scene of Housing crisis. If everyone wanted to sell BTC and no-one wanted to buy, it would crash just like anything else.