Businesses working with crypto and Tether

I’m pretty new to the community and crypto itself. I wonder whether any of you know (i’m pretty sure you do as there are many crypto enthusiasts here) which businesses work with cryptocurrencies: with USDT, to be precise. I’m writing a feature about USDT, its current legal struggles, the relationship with businesses, and I want to find as much information as possible.
What I managed to find so far is this blog post on who accepts tether but i need more sources on this topic

Thanks everyone in advance

How hashlib hashes ascii type inputs

Hi I am new to bitcoin I just want to know how hashlib hashes ASCII

b' \x00\x00\x04\xed\x1d\x8c\r(m\xb2[\xbfy\tf\x13\xb8\xb9$={\x13\xd1\x00\x08\xd1:\x00\x00\x00\x00\x00\x00\x00\x00\xc5\xcc\xfdz!\x00\xd8\x06>i\xd2\x97+\x13.\xf9rK\xa3\xe80\x04\xe8!\x1c\xf5\x04\xacF\x8bj\xed\x17\x14\x96$\xff\xac\xed\xe8\xb0\xaf\xb4\x00\x00\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x02\x00\x00'

This kind of Inputs

Does anyone have a step by step tutorial in how to use Bitcoin Core in 2 laptop airgapped scheme?

What I mean is, 2 laptops:

-laptop 1: Connected to the internet, synced, has watch-only wallets of all private keys to be found in laptop 2’s wallet
-laptop 2: Never connected to the internet. You just install the latest version of the distro of choice, install Bitcoin Core, create your wallet there.

Now with PSBT I think it’s easier to send the raw unsigned transaction from one computer to another (back then I think this was done by hand). The thing is, I don’t want to screw up, so im going to test this in testnet mode first. Nonetheless, I would like a step by step tutorial to see each step done well by someone that is experienced in this setup. Im asking because I just only find people using HW wallets which I don’t like, when I search for PSBT, but no 2 Bitcoin Core laptops scheme. Ideally you want to use an SD card better than an USB to move the PSBT file from one laptop to another so that is how I plan to do it. Or even better generate a QR code, but I don’t have a reader right now so I will go with an SD card reader.

Anyway, please let me know because I cannot find any video or blog post on this.

Crossing borders: security scheme ideas

More and more airports force you to decrypt your data, they will also dump your stuff keeping a backup. This could happen in just about any border you try to cross. It is only safe to expect this to get more common.

The question: how do you keep your wallet.dat file safe?

-Full disk encryption: A big problem since you are prompted with a password right at the start when you turn the laptop on, no way out.

-Hiding it in some obscure file somewhere: Forensics have tools to find headers that match encrypted volumes made by popular encryption programs, so I don’t think it would fly. Also realize that they do data dumps so your stuff would be there for them to find eventually.

-Putting your encrypted wallet file somewhere on the net: Where, and why would you trust this anyway? you don’t control the servers. If you have to pay for the service, you have already linked yourself to the file. If it’s free, you still can’t trust these services, for instance these famous "end to end encryption email services". Who says they cannot access the data or that a database leak wouldn’t happen? Plus the general not so nice feel of knowing a backup of your file is somewhere and even temporarily, once you delete it you don’t really know if it was really deleted. Any encrypted file now is like a treasure for crackers since Bitcoin is a thing. Of course if we assume Bitcoin private keys are safe then a strong 64 character password should be impossible to bruteforce, but you must be able to remember this password on your mind, and im not so sure that you can generate a 64 character password strong enough that you can remember it while being safe from bruteforce.

Anyway, im looking for your ideas. Also because I only trust Bitcoin Core I do not store coins in Electrum so the "12 character password seed" is not a thing. HW wallets are just big signs that say "look, this dude has coins there" so it’s pretty pointless. Im really out of ideas in how to try to move around borders while storing coins in the Core wallet format so please let me know your ideas. Cheers.

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Is there some known LEGAL trick to get out of having to pay Bitcoin taxes for a non-rich person?

I live in Sweden. The demented, people-hating government is demanding 30 % of all profits whenever I touch my Bitcoin in any way, meaning in practice ~30 % of the sum, period.

This means that, not only does the price have to go back to ATH, and further to 100k USD, but it has to also go another 30% from there, so 130k USD, for me to actually get a Bitcoin price of 100k USD.

With fiat money being worth next to nothing, and the smallest apartment costing millions of SEK, and houses many millions, even 100k USD of pure profit is next to nothing today. As insane as that sounds.

I’m not going to let them (easily) put me in a cage. I’m not going to move countries. I’m not rich and able to set up elaborate, complex, international company networks to weasel my way of out these stupid taxes.

Who is to say that they won’t increase the Bitcoin tax to 60% tomorrow? Or 99%? Or 100%? This seems like a massive issue; they make the laws and can put us in cages, and we have to obey these laws which we have never agreed to.

Is there anything that I actually can do? It’s going to be extremely hard to ever justify selling/using any Bitcoin with such insane taxes. Those 30% feel just like 50% to me. It’s a massive piece that just gets cut off.

how to get every inputs signature from a raw hex bitcoin transaction?

I have this raw transaction :

It has 5 inputs, and I would like to get the signatures of all of them.
I can use bitcoinlib to get the info about this transaction, but the info doesnt give me the signatures.

I used ‘transaction_deserialize()’ from the transaction module to get the info.

I already have, server=1 and txindex=1, into the bitcoin.conf file

How can I decript any raw transaction to get the signature of all the inputs?

receiving a small refund

I was joining a website and asked pay with bitcoin and they say they will refund a tiny bit back to me and the last 4 digits will be my passcode.

Is this even possible? how would there computer know what code or wallet they would be sending it back to.

As from what i know from selling and receiving bitcoin always needs a new code which they haven’t asked for.