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If Bitcoin was the worldwide money system...
Suppose that you work and save your bitcoins, to purchase something big like a house or car, but the value fluctuated like crazy, as the stock market does.
Whats to say you wont be rich today, but broke tomorrow? Today you could buy your necessities but tomorrow you would be back to zero?
How can individuals in a society live like that? You would revert back to the caveman system of bartering hard goods for goods in trading because the concept of money would be too erratic.
2I upvoted you for making an astute (if not blatantly obvious question), but you can expect many irrational anonymous downvotes when ever you speak rationally against Bitcoin in this site. Don't forget there is a lot of money "invested", that is nervous about shining a rational spotlight on weaknesses. – Shelby Moore III – 2013-03-23T20:59:08.297
1@Vali, It's precisely because it is not used as a daily currency that it's value changes erratically. The lack of volume allows easy volatility swings. – Pacerier – 2014-02-15T18:45:39.477