A MILLENNIUM TOWER CONDO LOST 45% VALUE IN A DECADE. HAS DOWNTOWN S.F. REAL ESTATE BOTTOMED OUT?

When a condominium in San Francisco’s Millennium Tower hit the market a decade ago, it offered a living space — and a lifestyle — that only a well-heeled buyer could hope to attain.Millennium symbolized luxury and boom time aspirations. A concrete hulk swathed in glass at Mission and Fremont streets, it gleamed over a South of Market neighbor