The Florida real estate market may have taken a few hits after 2008, but mansion sales are booming in Miami, sparking concerns that a mansion bubble is growing and could pop if the global financial situation worsens.

CNBC published an article about speculative, rich investors who are driving mansion sales in Miami.

In one case, a wealthy buyer acquired a condo worth $25 million.

Some housing analysts believe Miami's mansion sales could eventually disappoint, leading to a crash in the high-end market.