These will serve as an effective identification and differentiating feature for the visually impaired as well as for the general public. Coins can now be differentiated not only by size but also by their edgings. Different coins will have different edgings. This will help greatly when the coins are about the same size.
Thus, the strategy seeks to trade off the near-certainty of worse macroeconomic performance today for the chance of disproportionally better performance in the future, on the theory that the repercussions of a major market correction could be highly nonlinear. But the extra-action proposal is by no means a bold call for central banks to prick market bubbles.