Why are there charges for arbitrage buying and selling and pockets transfers?

Deciding which trade to purchase BTC from (and promote at a future date) I questioned if I may select one with the perfect charges for purchasing and a separate one with the perfect charges for promoting and if that is even allowed.

Certain, however you may have to make use of the blockchain to switch the bitcoin from one trade to the opposite.

It’s as I learn in different threads however there gave the impression to be a charge for any such operation. I assumed once you purchased BTC from an trade it might be precisely the identical BTC (not a wrapper instrument) as for those who purchased it from another trade. How may there be additional charges if the exchanges themselves cannot inform the place the BTC in your pockets got here from?

There is a charge for executing a transaction on the blockchain. Exchanges usually impose this as a “withdrawal” charge. They do not care the place you are withdrawing from or the place your deposits come from. However these transactions do have a charge related to them.

I additionally wrestle to know why there can be charges to switch BTC from one pockets to a different. A pockets AFAIK simply shops non-public keys, anybody in possession of these keys (like your self) may simply register in one other pockets and use that personal key to switch the BTC to your second pockets. I am positive there is a gap in my reasoning someplace.

Proper, so to switch the bitcoin from one pockets to a different pockets, the non-public key that authorizes their switch needs to be modified from one custodied by one pockets to 1 custodied by the opposite pockets. Solely the blockchain can try this.

It’s unattainable for an trade to assign separate non-public keys to each consumer to reduce charges. In actual fact, such a setup would maximize charges as a result of each switch of bitcoin balances between customers on the identical trade would lead to a blockchain switch.

For instance, say I deposit one bitcoin, then promote it to Alice who sells it to Bob who then sells it to Charlie. If the non-public key securing that bitcoin needed to change every time, then every of those exchanges would require processing a transaction on the bitcoin blockchain. That may be far more costly than executing blockchain transactions solely on withdrawals.