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Are we in a tech bubble about to burst? Facebook bought WhatsApp for $19 billion earlier this year. WhatsApp CEO Jan Koum speaks during a conference at the Mobile World Congress 2014 in Spain.
David Ramos/Getty Images
April 7, 2014 Over the past few months, the country's biggest technology firms have spent billions buying startups like WhatsApp and Nest. That has analysts wondering if another tech bubble is about to burst.
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