Yesterday the French cash limit was 3,000 euros. Today the cash limit is 1,000 euros. Tomorrow (not in the literal sense as timing is uncertain), cash transactions will be restricted to 100 euros, then banned altogether.
The same applies everywhere, including the US.
Want to buy a candy bar? The government will want to know where the purchase was made, how much you paid, and where you got the money to buy the candy bar.
Read more at http://globaleconomicanalysis.blogspot.com/2015/03/cash-dinosaur-france-limits-cash.html#HmPOlrHgpkXFYxXY.99