Why reusing a bitcoin address can reduce your privacy

[Cricktor]

I am not in a campaign yet but I guess I know why it's a problem if everyone is getting paid to the same address for as long as possible. That's basically a privacy leak. But we can not tell whether some of the participants make use of silent payments or managers using LN for pay out to contain this.

...

It doesn't really matter that every payout from a campaign commonly is sent to one address per participant. In the application process applicants publish their receiving address here in the forum. So it's basically public and attributable to a forum account.

Even if it were non-public, e.g. via PM, the public weekly results, spreadsheets and payment transactions would make it rather easy to attribute receiving addresses to campaign participants. So it would make not much sense to try to keep it "secret". It would be error-prone more work for basically little to no obscurity.

Later if and when you consolidate the payments, you could use coinjoins or other methods to obfuscate the origin of those coins. It depends on what you want to achieve or what you want to hide.

All on-chain Bitcoin transactions are public. The question is, are they also attributable to individual entities?


Regarding Electrum servers:
For various reasons (and because I can) and privacy is one of them, I operate my own full non-pruned node and Electrum server and local instances of blockchain explorers like mempool.space and bitcoinexplorer.org likes. Whatever I do with my wallet's addresses or with some blockchain digging, it stays local and nobody else can log stuff.

[ChisomP]

But, BTC wasn't created to be as private as we intended, it was meant to be transparent and fair, it was meant for capitalism, it was meant to create a trustless system because everything is as clear and transparent as crystal, so I feel if we are devicing means to undermine this feature, then your transactions are most likely suspicious. This is my take on this subject matter.
Well I guess the potential threat being posed by quantum computers, is making us think of ways to make our investment as private and secured as possible, but all I am trying to say is that, the transparency of BTC is a core feature of the system/blockchain.

[Cookdata]

But, BTC wasn't created to be as private as we intended, it was meant to be transparent and fair, it was meant for capitalism, it was meant to create a trustless system because everything is as clear and transparent as crystal, so I feel if we are devicing means to undermine this feature, then your transactions are most likely suspicious. This is my take on this subject matter.
Well I guess the potential threat being posed by quantum computers, is making us think of ways to make our investment as private and secured as possible, but all I am trying to say is that, the transparency of BTC is a core feature of the system/blockchain.

Bitcoin isn't private, you can't hide anything on it but you need some privacy when using Bitcoin because there are people watching things that goes and mine into the block, there are people that want to know how you spend your Bitcoin and there are evil people that want your Bitcoin by any means. If not for nothing, do it for the fact that you need privacy, you don't want people to know everything about you on the internet, you can own Bitcoin without nobody linking it to your identity.

If you feel like you don't need privacy, that's cool but we have other people that own Bitcoin and don't want people to know they have Bitcoin. There are some countries that you can't hold Bitcoin as a government official, this has limited them to what the want, they can wish to have Bitcoin without linking to their self and that means they need to break any linkage between them and their Bitcoin wallet since Bitcoin isn't a private network, improvised and use address once, this is also protect people against quantum attacks.

[tbct_mt2]

Bitcoin isn't private, you can't hide anything on it but you need some privacy when using Bitcoin because there are people watching things that goes and mine into the block, there are people that want to know how you spend your Bitcoin and there are evil people that want your Bitcoin by any means. If not for nothing, do it for the fact that you need privacy, you don't want people to know everything about you on the internet, you can own Bitcoin without nobody linking it to your identity.

Bitcoin is not a privacy blockchain and bitcoin is not a privacy coin but people can have better privacy and anonymity if they know and use non custodial wallet, change addresses, UTXOs for their transaction inputs, outputs properly. Gaining better privacy and anonymity is possible with Bitcoin blockchain but people must learn and know how to do it, as well as do it properly and carefully.

Bitcoin privacy resources.
Protect your Bitcoin privacy.
Bitcoin privacy guide.
The risk of posting your exchange's address publicly.
What is the "Change" address on bitcoin wallet ? read to know !

[satscraper]

This is going to more risky with quantum computers in future, but even Satoshi wrote that bitcoin address should not be reused for privacy reasons.

Quantum computer threat in the context of address reuse is primarily relevant to security rather than privacy ^{or more precisely, anonymity}.

A reused address may eventually be linked to your identity, and then you can say goodbye to your anonymity ^{especially if it is somehow clustered with other addresses from your wallet}.

[Comeacross]

But, BTC wasn't created to be as private as we intended, it was meant to be transparent and fair, it was meant for capitalism, it was meant to create a trustless system because everything is as clear and transparent as crystal, so I feel if we are devicing means to undermine this feature, then your transactions are most likely suspicious. This is my take on this subject matter.
Well I guess the potential threat being posed by quantum computers, is making us think of ways to make our investment as private and secured as possible, but all I am trying to say is that, the transparency of BTC is a core feature of the system/blockchain.

Transparency of BTC is a core feature, no one can take that away. The issue here is not the privacy of BTC but the privacy of the person behind the coin. Not everyone that wants privacy is doing something suspicious, some just don't want to be a target because if everything you do is visible, you're likely to be a target.

Transparency is what makes BTC great but it's terrible for users in many ways. So being concerned about privacy is not automatically suspicious.

[AakZaki]

If you feel like you don't need privacy, that's cool but we have other people that own Bitcoin and don't want people to know they have Bitcoin. There are some countries that you can't hold Bitcoin as a government official, this has limited them to what the want, they can wish to have Bitcoin without linking to their self and that means they need to break any linkage between them and their Bitcoin wallet since Bitcoin isn't a private network, improvised and use address once, this is also protect people against quantum attacks.

It should be more restrictive how to use the Bitcoin tools that will be associated and used to store the Bitcoin set. Disposable wallets are good enough to eliminate user traces, but you can also use special and exclusive hardware wallets so that no one can find out what assets you have. Never connect with anyone's wallet in an easy way. You can use the mixer platform to randomize all transactions so that they are not easy to trace, that's the best way so that they don't focus on the real identity.