Geektime asked some of the world's foremost futurists their tech predictions for 2015. You heard it here first.

1. Bitcoin was overrated, and won't pan out in 2015 either.

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Bitcoin slipped more than 70 percent in 2014. Sonny Singh, chief commercial officer at BitPay, has said the digitial asset is beginning to mature into stability. But most forecasters, unsurprisingly, are bearish on Bitcoin.

“I am bearish on Bitcoin,” tech writer Robert Levine, who authored Free Ride: How Technology Companies are Killing the Culture Business, told Geektime. “I think it's a fascinating technology that points the way toward the payment systems of the future. I just don't think it IS the payment system of the future. I think the mass audience wants more secure systems.”

2. 3D printers may mature, but they still won't be widely adopted.

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Gartner has predicted that a total of 217,350 3D printers will be sold in 2015. 3Dprint.com predicts the number will be closer to 400,000. Hod Lipson, editor of 3D Printing and Additive Manufacturing told Geektime that this is the year the technology will “mature.”

But Robert Levine suggests a consumer reality check: Manufacturing objects at home may “involve more effort than most people prefer to put in.”

3. People will become more concerned about how much data they are sharing. 

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Everyone was up in arms about governments conducting mass surveillance of citizens following Edward Snowden's leaks regarding NSA data collection in 2013. But corporations are collecting massive amounts of data as well.

According to tech writer Robert Levine, there will be more hacker attacks in 2015 that expose increasing amounts of information, which will make the average user more concerned about how companies are storing their personal data (if the Sony hack and other attacks haven't frightened them enough already). “This will make Internet users more aware of how much of their personal information is in the hands of companies, and I think this will start a much-needed conversation about how corporations, as opposed to just governments, present privacy issues that we need to think about.”