If it is only buying and selling on exchanges, how do you think they are profita

[sherbyspark]

Most of the exchanges make money through transaction fees, which can be pretty big.
and even the difference between buying and selling.

[Hfleer]

Most of the exchanges make money through transaction fees, which can be pretty big.
and even the difference between buying and selling.

you are thinking about service provider, not exchanges...

[Mobius]

Most of the exchanges make money through transaction fees, which can be pretty big.
and even the difference between buying and selling.

you are thinking about service provider, not exchanges...

Some exchanges do use their own money to trade bitcoin; it is rumored that chinese exchanges do this a lot. He is however correct to say that exchanges to primarily make their money from trading fees.

[DhaniBoy]

in the stock market, a lot of buying and selling currencies of various countries, there is no buying and selling of goods there, how do you think can profit in the stock market?, of course, the gains from the difference between currency sold and bought there, just like bitcoin exchange, hopefully you understand with my explaination ..