It's still far from practical, there is nothing to worry about quantum computer, there will be sure the algorithm will be updated when the quantum computer can broken SHA 256.

Quantum computers are common news since 15 years, and not single one exist yet

This is correct. And from what I could see after reading some articles how Quantum Computing works. QC are not exactly the best machines to solve cryptography problems. They are not working as our current gen machines. And if bitcoin will be in danger so the risk of quantum computers is also there for financial institutions, like banks, because they heavily rely on cryptography when processing transactions.

I wont sell u @ 1 USD/BTC. Because, if SHA-256 is broken, online banking is broken. USD has no value anymore. I want 1000 USD/BTC.

you think when Quantum Computers are available, they will break anything! Like Bitcoin, bank, even USD!how could it be! The ppl behind then wouldn't let it happen! They will implement Quantum Computers to their systems as well!

Why did you make another thread when you've already posted a link in the other one?
This is as big of a deal as the usual discovery of amazing battery technology that we've never actually seen anywhere. The quantum computers aren't here yet, although times are quickly changing in modern society.
How about SHA2560? 

lol.. theoretically no ammount of hashing encryption could stand up against a pure quantum computer from the future

nothing, bitcoin as a target would be the last of our worry, unless by that time it was skyrocket to 1M per coin or other unimaginable value

ssl, banks and any other system could be violated easily...and they think that we should worry about bitcoin....

And the whole industry of internet payments would collapse. Yes, I definitely vote for going back to the old ways. 
We should be looking forward, not backward.