Bitclones is defined (credit to camosoul) by coins that secure and confirm transactions at the same time. They will never work for point of sale.
Solarminer - although I agree with most of your well made points, I just wanted point out one stark truth.
No blockchain asset will ever work for point of sale - no matter how fast its confirmation time is.
Ok - it might get used by chiringuitos on the beach or the odd newsagent, but don't be fooled by these bitpay interfaces where you see business accepting bitcoin at POS. Thats just posturing to demonstrate that the asset has some value.
There are two reasons why bitcoin or any raw blockchain cryptocurrency (as opposed to crypto denominated currency) will never be used at point of sale en-masse:
[1] - EconomicsCryptocurrency is a
risk-assetThat's both a good thing and a bad thing. It's a good thing because risk assets can form the basis for a monetary medium - like grain, precious metals, coal, oil, flour, whatever. They are capital assets which can 'back' other assets.
It's a bad thing because they are no use as a currency for modern retail since they are fixed supply which means that the only way they have of responding to liquidity demand (economic expansion or contraction) is through price inflation or deflation. Modern economies have gone way past trading risk assets for goods and have instead decoupled them from the currencies that they back so that the price represents the value of the good rather than the value of the currency being used to facilitate the trade.
The only problem is that they've taken this too far and are now using debt (hypothetical future economic activity) to back currencies as a majority capital base instead of a minority one.
[2] - TechnologyTransferring numbers is far faster than doing transactions on a blockchain. Thats why supermarket transactions will always be buffered - regardless of what currency is used. The buffering insulates the retailer from all kinds of sh*t that can go wrong and gives them space to fix stuff before they actually commit their transactions which they may do at hourly intervals.
The example I like to use is where the cashier rings through your cornflakes on the person in front of you's credit card cos somebody put the belt separator in the wrong place. This is easily remedied by functionality in the point of sale system which incorporates all sing, all dance, reverse, push to stack, pull from stack, hold this order while the customer goes and gets the cabbage they forgot to get weighed, functionality that you could never do on the blockchain.
So forget about point of sale. It's not an issue for any crypto because thats not its job. It's job is to acquire value and to back currencies which may ultimately be used in point of sale scenarios.
However, one of the properties of money that does affect its value is
mobility. This is where Dash's instant confirmation is significant because it consolidates its identity as a
cash medium as opposed to a credit one. (When I use the word "cash" I'm thinking of coal, grain, oil, notes, metals - things which are immediate and tangible).
All modern assets can be traced back to cash media: tangible, instantly transferable, limited supply, unobscured, publicly accountable resources. What bitcoin did was simply to mirror those properties on an electronic platform and what Dash did was to add a simulated cash drawer (the clearing points for payments where notes get 'mixed') which was what bitcoin was missing.
Think of a cash economy in your local street. Is has "choke points" (to use Greg Maxwell's term). When you go to your newsagent to buy a newspaper, your notes and coins go in a cash drawer along with all other "inputs" for the day. They then get mixed again on an even grander scale at 6 O'Clock in the evening when the retailer deposits their takings at the bank. Moreover the cash is denominated - 1 Pence coins in 1 Pence bags, 10 Pence coins in 10 Pence bags, etc. Thats another layer of mixing. Then the coins and notes get dispersed back into the economy with not a snowballs hope in hell of tracing anything without marked notes.
That is a true cash system - open, public, visible but anonymous. Those "choke points" (the cash drawer and the bank) perform a mass anonymisation action periodically on the money supply and remove all traceability through mixing. This is how money has worked through the ages.