Interesting - what makes you think that?

I see it as an hedge against inflation and central bank QE similar to gold, but very liquid and without the mass market manipulation which both currency and commodities suffer. When times are tight, people might also use it just to save 3 or 4% card charges - essentially a universal and private tax on shoppers worldwide. There is also the prospect of fiat savings being confiscated a la cyprus of course which makes btc savings account more interesting. Companies will still run, produce things and people will buy them, but perhaps they will realise the bills in their wallet do not have a 'guaranteed' value and turn to bitcoin has a more transparent and reliable currency.

bitcoin (and other cryptocoins) is a great currency to use in a fairer economy (ie not manipulated and/or taxed arbitrarily), and I really hope that's what we will see at the end of this tunnel.