not very clear what your mean, we trade bitcoin with any fiat, bitcoin is good so we use it but not sure whether it is the best and how to determine that bitcoin is not the best to trade?
I would say that, from the point of view of a trader, a digital currency has to satisfy 2 major conditions:
1. It has to be liquid - there has to be enough volume available, so the trader is able to get in and out of the position when he needs to without paying to much bid-offer spread. larger trading volumes also makes the currency more difficult to manipulate
2. It should offer volatility - it's easier to make profit trading the currency that moves up or down 2-3% within one day than the one that moves on average 0,2% per day. Having said that, trading the currency that moves 30% per day might be more like a gamble.
Other issues to consider are:
- are there tools available, such as charts, etc ?
- can you open short position or use leverage ?