Cryptocurrencies are very convenient to pay for everyday life and I see no reason not to use them for this.
If we want to use the cryptocurrency as for normal buying and selling we will need the support from government if the government will not accept cryptocurrency to be legal in their country it will not be possible at any time.
I don't agree with you. Yes, governments will interfere with the introduction of cryptocurrencies into existing payment channels but progress cannot be stopped. Sooner or later, cryptocurrencies will become as an integral part of payments as Visa or MasterCard. But to do this, you need to create a really good platform on which you can implement these ideas. I wish Quarkchain will become such platform.