Building on your post, I would add the following questions, which were the conclusions of my presentation:

“So if we take the trends we’ve just explored:
1. Virtual currencies have grown to be traded as if they were real currencies
2. People are moving money from one person to another via the internet or mobile devices

… we may be able to come up with the conclusion that where this is going, in the long run, is an area where exchanges could be set up either online or on mobile devices to use virtual currencies are real currencies.

And if we assume that this first step is possible, then it’s not too far away from the next step, which is an explosion in the number of currency offerings we may see in this world.

What we’re seeing here is the first shot in what I think is the next evolutionary step in the history of currency and it’s an evolution that could either be a transitional phase without major disruption or a massive change in the way people are interfacing with currency: this could be our generation’s Nixon Shock.

The issues around this new world are significant.

The first issue is around who is controlling those currencies. For most of history, currency was under the control of the currency issuer. But in the last couple of centuries, there’s been an increasing trend towards government control of currency.

How will government react when their own currency is challenged? And will their reaction matter? After all, the Chinese governments actions to date, as far as the QQ is concerned haven’t stopped trading.

What will happen in terms of tax collections? Will government have to start accepting currencies beyond their own as agreed form of payments? And if they accept other forms of currency, will they have to accept other government-run currencies as form of payment?

How will criminal behavior be dealt with? Today, criminal elements can be tracked because whenever they have to deal with some currencies, they have to eventually deal with banks. And because banks are regulated, criminal behavior can be intercepted. What happens when those money flows move outside of the financial institution control? Shouldn’t governments think about regulating those institutions as money transfer operations ?

What happens when the number of currency explodes? Sure, computer systems can do the conversion without problems but how will WE assess the worth of a currency?

And, as currency initially proliferate, there will eventually be a move towards an agreed upon set of new currencies because remember that currency is ultimately, about an agreement value by all of us. But when some of those currencies die, what will happen to the people holding them? Will the dead currencies be converted to emergent ones? And what happens if the dead currencies are ones that were controlled by governments? Will they fight for survival?”