Irrelevant. BTC has no physical cash form so being able to "withdraw" it in that sense from a legacy bank is impossible. However, so many vendors accept BTC in some form or another, in addition to their being localbitcoins and similar avenues, it is clearly superior to cash which can be withdrawal-limited by a government at whim. The government would have to enact far more draconian rules to limit electronic cash spending (i.e. you can't spend more than .5 BTC at tigerdirect or coinfueled per day... lol.)