Safeguards built into the bitcoin software are about to be triggered as the number of bitcoins in circulation hits a key milestone.

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The centre's architect Zaha Hadid described the work as a "key milestone".

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Then fill in the left side of the timeline with every key milestone and accomplishment you achieved over the past year or two.

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The monthly figure averaged 130, 000 over that span, and economists think that a monthly reading closer to 200, 000 per month is a key psychological milestone for consumers to start thinking about committing to major purchases like new homes.

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