No. Why? Because the rate can be too much influenced by a small group of traders and because the exchanges have a bad name. To me it is like dealing in a low volume stock: Trades can (when not a lot of counter trades available) influence the price too much. Also you may come in the situation where you want to get rid of your bitcoins but there a not a lot of people to take it over from you (what results in a price fluctuation as well). And a bitcoin has a higher change to become worthless than almost all currencies. I just don’ t like digital currencies as I don’ t like low volume stock trading.