this is such an strange question!
when you exchange USD to BTC no matter what method you use, you will end up paying a bit more either for fee or a bit more because the other guy has to make profit.
the same goes when you want to exchange BTC back to USD, a little bit for fee and a bit because the other guy has to make profit too.
for example you will end up paying $11 to buy then after selling end up with $9 and there is no other way around it.
in short you lose money not save money.
and if you are a seller yourself, you can't do it right away. you have to wait for a long time to get someone to buy from/sell to you
Yeah thats really confusing question an didn't really understand what he really want achieve with that. The loss would be for sure there. When you talk about bitcoin you have to give some time for it so that it an grow into price and that too ahead of your buy price which is always higher than your sell price at all time. Otherwise all exchangers would end up with loss. So, for you to transfer back your $10 you will have to wait for that right point when BTC price hits your buy price. That would be your break even point. And it is not that quick to achieve as well.