I wish someone would take a few months to gather all the predictions made in this forum and make a list of the best nd worst predictors
'Someone' has already invented such a prediction-validating mechanism. In fact, this very thread was originally created for speculators who engage in such predictions.
It occured in very rudimentary forms since ancient times, saw a further sophistication during Roman rule, disappeared during the dark ages (obviously), reappeared in the late middle ages mostly around Italian city-states, & finally, emerged in its modern financial trading market form in ~1602 in the Netherlands, as the Dutch East India Company's shares were first traded among investors.
Later, the ~1880's featured the advent of something yet closer to current currency/crypto trading exchanges - world currencies began to be backed by gold, and the first large-scale retail forex trades started taking place.
It wasn't until 1996 that the Internet gave these foreign currency exchanges the capacity to run the entirety of trading electronically. Various digital new currency projects such as e-Gold/etc were soon undertaken excitedly by a series of hopeful entrepreneurs.
..Sadly, in large part due to vulnerable centralization & the absence of math-based strong encryption systems as core features of these innovations, they ended up failing & dimming public opinion of
any digital currency concepts as irreedeemably flawed Ponzi schemes. Nevertheless, amongst the ashes of these unsuccessful experiments, a different, vastly more sound, secure & viable project came to light : Bitcoin.
It is thusly that in early 2011 the very first bitcoin exchange markets were founded, bringing us full-circle to the present day as we find, with the warmth of serene satisfaction, that exchange markets indeed offer the best mechanism through which to filter the least skilled from the most skilled predictors, by comparing traders' accounts' initial investments with their net equity several months or years later.
(Sorry, I just love history xD)