The general problem with leverage is a margin call though. You largely will not get margin called over your house. The bank doesn't want it. And also the house

The general problem with leverage is a margin call though. You largely will not get margin called over your house. The bank doesn't want it. And also the house largely won't get re-assessed in value so you can launder the volatility through bad markets. However, if you take out a $1M stock position and it drops down to $0.5M the broker absolutely will re-assesse your position based on market prices and then take liquidate you to ensure they're whole.