There is one road block against 股市崩盤.

FED money printing and buying assets.

Theoretically, if FED can print unlimited money to buy stocks through its open market operation arm, the stock market will float.

I think before 2005, the market can still keep its new Normal. After that, as sovereign crisis comes home to roost, all hell will break loose. Either hyperinlfation or severe deflation. Before that, let party go on.