Bitcoin / Bitcoins / Crypto Currency

Why do you recommend this method?
I can see the benefit to anonymity in paying in cash.
I would actually favour an auditable method when investing the majority of my estate.

Also how do you confirm the bitcoin are authentic before payment to a man in the street?

Lack of onerous background checks on you that involve you sending your full identity and scan of passport to a foreign third party that you don't really know.

And you can add a fee to the bitcoin transaction to increase the priority of the transaction. A fee of a couple of quid should get it done in 30 minutes.

So meet someone, perform the transaction on the understanding you stay together and with the money until it shows in your wallet, then leave.

It's a much quicker, and safer, process than using a company in country X that requires you to bank transfer via country Y and send your passport and identity to country Z.