Best Way to Make In-Person Bitcoin Transactions Safely?

So if I’m just using Bitcoin Core on Linux and wanna pay someone in person, how do I do that? I can’t just whip out my laptop. Anyone got ideas for a discreet device?

You could try the Coldcard Q1. It's supposed to be good and is coming out soon. If you're looking for something more smartphone-like, there are Linux phones that might fit your needs without raising too much suspicion.

I don’t get it. Just bring your laptop! Find a safe spot to meet, like a café.

You could make a signed transaction at home first, then take the raw code with you. That way, you can broadcast it once you meet, but if it doesn't go through, no need to broadcast.

Hot wallets can work too. Use Electrum with your Bitcoin Core. Move your funds there before you meet and make the transaction from your phone.

I get that you're worried about Android privacy, but connecting to your own node helps.

But what if fees spike before you meet? Or the seller can't give you the address in time? Mobile wallets aren't always reliable for that.

You could enable RBF (Replace-By-Fee) in Bitcoin Core. That way, if fees change, you can adjust it later. Just remember to activate it before signing.

But what if you signed it already and then need to up the fee? You’d have to go back home to re-sign!

Exactly. Unless you enable RBF beforehand, it won’t work. But if you did, you can replace the transaction later.

There are online tools to help with broadcasting signed transactions. Just copy the raw data and you’re good to go.

Ever thought about a privacy filter for your phone screen? Or does that make you stand out too much?

Dude, that Fairphone is overpriced. It’s like they’re charging a premium for being eco-friendly.

There are smaller devices that look like pocket computers. Just blend in with the crowd!

Yeah, but I’d still prefer something lightweight. I’m not carrying a laptop everywhere.

How about a paper wallet? Just fund it with the amount you need for the trade.

Not a bad idea. He could sweep the private key later. Simple and effective.

Seriously, can’t we just use a smartphone? Plenty are secure enough now.

But then you risk looking too nerdy. A laptop screams ‘I have BTC!’ more than a regular phone.

And laptops are heavy. Plus, you need WiFi, which isn’t always available when you need it.