Access to money while traveling can be an issue. You might looselose your cards and/or wallet or you need to repay someone from another country
Are bitcoins worth considering? To me it sounds like an ideal way to get money transfered quickly, but once you have the bitcoins can you actually use them to pay for your travel expenses.
So far I have only heard of pubs accepting bitcoins. So yes you can pay with bitcoins in a specific pub when traveling through England. Can you however already pay you hotel, plane ticket or repay a debt to a fellow traveler with bitcoins?