You cannot expect to be in full control of the wallet all through a trade
Bruh....
In a decentralized, P2P service, you are always in control of your funds
Common, let's not start to move definitions and goalposts here cause I clearly started this discussion based on your highlighted above remark!
You started saying that you're in control all the time till the trade is finished and now you're saying you can't expect to be in full control all the time while at the same time you were right when saying you're still in full control!
A huge difference between;
• Not your keys at all, and.
• Holding half of the keys.
What's that huge difference?
It's still the same, we were talking about
full control, not the incentive the other party has on doing the deal, not the risks, not anything else. If the other guy is hit by a tram while going to the bank and releasing your funds you're done for! You are not in control! That's what the definition for a multi-sig is, and this is why they were invented in the first place so that not a SINGLE entity has control over it!
As I said, let's not change 1000 years of word definition just because it suits our narrative now!
I live in Bangladesh, and I use payment methods like Bkash and Nagad. Those payment methods never ask where the money comes from. What is the source of this money? When it comes to banks, they ask for a photocopy of an ID card when someone deposits money into someone else account. Banks ask where the money came from to the account holder. Bank asks the source of the money when people deposit their own money in their own account.
Generalizing a particular country's situation is never good!
I've never been asked for a photocopy of my ID from a bank, just my ID when I go to the bank and deposit cash, which is standard procedure from 100 years ago, do the bank ask you every time where the money comes from when you're getting a payment from another bank? No, they don't and this is why apps don't also because you're loading your account from an already verified source!
But even that doesn't even matter since the whole thing is just ridiculous, I was curious what this Bkash is so a quick google search and
bKash (Bengali: বিকাশ) is a mobile financial service (MFS) [4] in Bangladesh operating under the authority of Bangladesh Bank as a subsidiary of BRAC Bank Limited. BRAC Bank Limited[2] is a private commercial bank in Bangladesh, founded in 2001.
So, you were saying what about banks?