I have to disagree.
The Exchange of Bitcoins is becoming more and more decentralised. From the all powerful MTGox, to 4/5+ main exchanges in just 12 months. Last year saw the introduction of the first Bitcoin ATM's and this year mobile bitcoin vending machines costing less than $1000 will erupt onto the scene, all of this in less than 12 months too.This year we will also see 'decentralised exchanges' for the first time ever. It is literally an EXPLOSION OF DECENTRALISATION.
From one exchange to five exchanges is not a change which could be used to establish your argument. Moreover, the tendency is more and more exchanges complying with government policies. Since such policies are similar across different jurisdictions the exchanges dealing with BTC will adopt practices defined by a central body of governance.
Bitpay exists not because of centralisation but because of slow bitcoin confirmation times and volatility. Both of which will ultimately be addressed in this or another crypto-currency making those centralised intermediaries obsolete.
Bitpay exist because they want to obtain marginal profit from the BTC/fiat currency exchange markets. Period.
The internet itself is a manifestation of the decentralisation evolution of man. After information the next steps are money and power.
This sounds idiotic, sorry. No, it is not.
Furthermore the most valuable crypto-currencies after Bitcoin are the ones that have evolved the decentralisation model even further.
(LC and faster confirm times and more ASIC resistant mining and other coins have POW etc.)
In fact the easiest thing to do would be to create a coin that was more centralised and had all the features the current centralised bases of power would like. But why out of the hundreds of crypto-currencies that have been made since Bitcoin has none been created yet? Generation Y would never use it.
What the other electronic medium of exchanges had evolved was the capacity of man to speculate with money.