You don't. Bitcoin exchange markets do it every minute of the day the world round: Tokyo, Shanghai, London, Bulgaria, Calgary and local Satoshi circles.
How does one estimate the future value? By taking a position in it, it is you that creates the future...
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[ 4.2 ms ] story [ 13.9 ms ] threadHow does one estimate the future value? By taking a position in it, it is you that creates the future...