Many of us use bitcoin only in exchange/trading site, while bitcoin should be more used in marketplace/online shop. Which one do you choose? Do you prefer to use bitcoin on a trading site or marketplace/online shop? And why do you chose that?
The goal for Bitcoin is to become a way of payment but now it is used as speculation instrument. So I'd prefer to use Bitcoin for online purchases but now market is not ready for it - the volatility rate is high enough and transaction speed is low. So there are not many services who accept Bitcoin.