Post
Topic
Board Bitcoin Technical Support
Re: How to have reasonable privacy safely when paying?
by
takuma sato
on 12/02/2024, 06:15:18 UTC

Use a new address for EVERY payment of Bitcoins that you receive.

I see a lot of people mentioning this here, but this is not always possible. The most obvious reason, anyone participating in a signature campaign is receiving repeated payments on the same address for the duration of the campaign. If you now use these funds to pay someone, this person could not only see the max amount of coins you have there currently or the maximun accounts you held there, but they could just google the address and find out your profile and ultimately source of funds.

Use coin control. Spend an output that is very close in value to what you are sending.

Yeah what I meant is, due price fluctuations and tx fees, some amount may be left there. Let's say you have 200 bucks left spend on your Android, and you want to buy something that costs 200, you basically have to add in an extra 100 because the price may dump by the time you arrive to the meeting to exchange the item or service for your BTC, plus fees. You always have to add this extra margin. If you have 200 and the price goes up a bit, and you have like 220, so you pay 200 + fee, perhaps there's like 10 bucks left or so, so you left 10 here and there, end up with a decent amount in different addresses, which if you wanted to consolidate into a single one, would mean that you compromise your privacy since you send a joined transaction with all of these.

Either is fine.  For small amounts that will only be in the wallet for a short period of time, and which wouldn't be hugely upsetting to lose, you might even find an account with a custodial service could be convenient.
What do you mean? You mean a wallet blockchain.info or whatever? I would prefer to avoid these.

Why?
What do you mean? for privacy, so when you pay someone they cannot look up your history.

And when you spend your local currency, you never know where that has been before you received it either.
You mean cash? cash doesn't have an online permanent public blockchain to check a track record of transactions. If you mean bank transfers, well same thing, there's no public records. And Bitcoin and crypto in general has just this bad stigma about it that regular transactions do not.

If you don't want to use a mixer, don't use a mixer.  If you want to use a mixer and believe that Bitcoin is fungible, use a mixer. If someone comes asking about the "source" of the bitcoins, tell them you used a mixer. If use of a mixer is illegal in your jurisdiction, you need to decide how you feel about non-compliance with that law.

I want to have a reasonable privacy, and when it comes to authorities, you just want to avoid raising any flags because they hate crypto by default.

In my jurisdiction, I find that the biggest inconvenience is the need to keep track of every satoshi acquired and spent so I can report every single transaction when calculating my capital gains for my taxes every year./quote]
Yeah this is insane. They just do this to frustrate people even at the thought of using it for payments.

Exactly.  FALSE positives.  Meaning, it doesn't really matter if you use a mixer or not. If an exchange wants to cause their customer "trouble", they're going to do it regardless.
Like I said, you want to avoid false positives. You don't want to deposit coins that raise chainalysis flags when depositing into an exchange and go throught some audit of all of your related coins. I mean why would anyone want that? This is why im saying, mixing the coins, or recieving coins from an stranger and putting them into a centralized exchange where you are doxed is a mistake, same goes for paying someone that knows who you are, that then puts these coins into an exchange. An extra intermediate step here is required.