This is in America alone.
There have been real estate bubbles in other countries during this time too: England, Ireland, Spain, and others. They also have problems. (See, for example, Denmark.)
Forty-six trillion dollars.
Men's hearts failing them for fear, and for looking after those things which are coming on the earth: for the powers of heaven shall be shaken.
-- Luke 21:26
Be alert. But don't fall into fear.