Yes you can certainly lose money. In the 80s and 90s prices crashed. It can certainly happen again or just stay flat. People have gotten too comfortable thinking real estate investment area easy investments that are guaranteed returns. Condos and new builds are often built at the minimum of the building code which isn’t great quality and in big projects things get modified, some trades who work on the builds are not great and some too the materials are not always great quality. There are likely to be problems like buildings in Australia are currently facing. Not telling people not to invest in real estate but they should diversify and be prepared to hold for much longer than 5 years if necessary.Prices do decrease, but eventually the graph has to go up.If a buyer can hold the property(in Toronto) for minimum 5 years, he can never lose money.
If you go with the reputable builder, built quality shouldnt be an issue.
http://theconversation.com/there-are-lessons-to-be-drawn-from-the-cracks-that-appeared-in-sydneys-opal-tower-but-they-extend-beyond-building-certification-109428