Sometimes is not the government, it's other people / businesses.
It's really none of Gemini's business if I bought my coins at Coinbase. But, now I can't take them out of CB mix them and put them into Gemini.
Should it matter? Probably not. Does it matter? Probably not. Can it matter? Hmmmm that's an interesting one. Going from one regulated exchange to another should not matter. But what if I'm a super math wiz investor and I figured out a way to make some money on arbitrage or something. If Gemini sees all my money coming from one source they might dig deeper. There are many other edge cases, but the point it still the same.
Worth discussing, but in the end we all know it's happening anyway.
-Dave
firstly. it is gemini's business to wonder where you got your funds from. literally it is their business.
they can be fined for allowing criminal activity. so its most definitely their business to try to avoid handling stolen funds and criminal activity funding. so yes they will want to know something about you
anyways.
if your arbitraging. you wont want to use onchain transactions anyway. because by the time you see an opportunity of a different spread on another exchange. request a withdrawal, do some mixing and then deposit to another exchange.. atleast 30minutes has passed if you paid premium fee's...
meaning all the other trading bots have taken advantage and shrunk that spread you liked. while you were messing around. meaning you missed your opportunity by messing around
.. but overall it means nothing. no one cares about privacy from going from one exchange to another..
after all coinbase knows your name and how much you withdrew.. gemini knows your name and how much you deposited. they can still connect the dots.. you know. math..
so its a bad example for 2 reasons. .. everyone knows you arbitrages via stable coins and things like sidechains to avoid confirm delay.. no one arbitrages via bitcoin blockchain/bank wire transfer. .. and as just said coinbase and gemini can stil connect the dots by just checking your account name against withdrawals and deposits.
anyway, mixing has always been deemed as laundering. so if you are requesting a withdrawal to a know mixer address.. you might find an exchanges terms and conditions prevent you doing this and will instead request you send funds to another address and never use their exchange again, to avoid them being associated with allowing customers funds to be sent to laundering services.
or receiving funds via a known mixer. again they may prevent you using any of their exchange services and ask you simply to withdraw your funds and never use their service again.
..
you might have been better off using an example of 'data-mining' to sell data to advertising companies. as a privacy concern for innocent people.
EG people that dont want to be spammed with email offers about sofa cushions, rugs and foot rests, because they have been found to have just bought a sofa