the thing regarding prices is how everyone sees it. Those who are going to buy btc to buy these items of course is very expensive. They are not going to buy 1 btc for EU 600 to pay for an item  Euro 187 by giving half btc(in the end giving 300+ Euro instead of 187). For users who already have mined btcs then there in no problem. Is up to them if they are going to buy. The problem seems to be with suppliers cause in my opinion they have a cost of production + other expenses + profit = final price in $/Euro but because of the high rise of btc rate they decided to increase prices to benefit. They dont change prices/btc accordingly with rates