Bitcoin is the King of cryptocurrency in 2014 just as Western Union was the King of credit cards in 1921 (before Visa, Mastercard, American Express and countless other credit cards and charge cards took over). Today there are millions of different types of credit card and charge card.
Western Union was a telegram and telegraph company. They have never issued a credit card or a charge card, are not licensed to do so, and were certainly never referred to by anyone as "king of credit cards". Especially since credit cards didn't even exist in 1921. They were the leading telegram company, and still are except that no one uses telegrams anymore. And yes there are different brands of cards available today. They are all denominated in ONE currency though, whatever currency your bank\country uses.
Accordingly, your argument is invalid. And yes I do use different methods of payment and different currencies for different types of transactions.
While you may in fact use numerous different currencies for each of the different transactions you engage in, I would be willing to bet that the overwhelming majority of people in the world use (except when travelling) exactly ONE currency, the currency of the nation they live in. Here in the USA anyways, if you tried to go to the grocery store or indeed any store, you would have a difficult (read, impossible) time purchasing anything with Euros, Yuan, Yen, Pesos, pounds, etc. Indeed, anything other than dollars. And now bitcoin, in some places.
If an unimaginative observer (in 1921) had been asked whether they thought other credit cards (aside from Western Union cards) would ever find favour, how do you think they would have responded?
I imagine they would have asked you wtf is a credit card, considering they weren't invented until 1958 by BOA under the brand name Visa. You might recognize this brand as STILL being the leading brand in credit card business (along with Mastercard, which they own). So I'm not really sure where you were going with this point.
The answer is that unimaginative people struggle to envisage anything more exotic than the status quo ante. And yet, in light of the above, you still maintain there will only ever be Bitcoin. Really?
I said "if". HE said bitcoin. I agreed, because a. it's obviously the leading contender, and b. it makes no difference to my contention. Which si that there will be one major currency that we all use, whether that is bitcoin (most likely) or something else, ordinary people are not going to walk around with 50 different wallets so they can shop at Best Buy with their Electrocoin and then go out to dinner with Foodcoin and then pay the tip with Tipcoin and buy gas on the way home with Gascoin.....etc.
Now we have established there will be numerous crytocurrencies (possibly millions of them), it is reasonable to speculate that they may be used for different purposes.
The central fact about crytocurrencies is that they mark the beginning of the end of government controlled monetary systems (albeit that the process may take decades or even centuries to complete). Citizens will never again allow governments to bail out greedy bankers. And in a decentralised system, there will never be any need to bail out greedy bankers anyway.
We have established no such thing. All you did was post some highly erroneous "facts" about western union and credit cards and called it a day. Aside from the obvious fact that everything you posted is clearly wrong, we have the intuitively obvious fact that almost everyone reading this now uses exactly one currency for most of their purchases, the currency of whatever country they live in. It would be decidely inconvenient if you walked into a store and purchased stuff in dollars but got change in pesos, and then the bank wanted payment in Euros, but your company paid you in yen, and your car payment has to be made in CAD but gas can only be purchased with Won.....well you see the point.
No one can predict the future. It is of course *possible* that one day some other crypto may supplant Bitcoin. I do not envision any scenario though where we have people making purchases with dozens of various alt coins, if for no other reason than the major inconvenience that it would cause.