Right at the moment, the exchange rate is around 340 dollars. One dollar drop wont affect me much though. I will still keep it in my ANX account.
I wanna know what kind of bitwealth, topmine, ANX...etc. different?
I think the different is between what company focus on. bitcoin company can have many focus.
The first two you post is for mining
The last you mention is quite special
focus on blockchain and the link between payment method