Marek Narozniak is a Polish physicist who works on a MimbleWimble implementation that can get added to Bitcoin via extension blocks to become a privacy layer. He also specializes in quantum computing, and busts some FUD about their threat.

Time stamps:

Introduction to Mimblewimble and Grin (00:00:40)
The Privacy Model of Mimblewimble (00:02:07)
What is Mimblewimble and Grin? (00:03:47)
Scalability and Growth of Grin (00:05:18)
Marek's Interest in Grin and Quantum Computing (00:07:16)
Challenges and Funding of Grin Development (00:13:36)
CoinJoin on Bitcoin (00:15:41)
CoinJoin and Privacy in Mimblewimble (00:16:49)
The Relevance of Mimblewimble and Grin to Bitcoin (00:22:18)
Bitcoin Philosophy (00:24:15)
Scalability and Design of Grin (00:25:37)
Compatibility with Bitcoin (00:27:31)
Quantum Computing and Bitcoin (00:38:31)
Quantum Resistance in Blockchain Networks (00:45:02)
Node Software and Wallet Connectivity (00:46:27)
Running a Node and Raspberry Pi (00:47:49)
Quantum Computing and Qubits (00:50:02)
Quantum Computers and Bitcoin (00:52:07)
Bitcoin and Cryptography (00:52:42)
Bitcoin and Investment (00:56:01)
Bitcoin Adoption and Use Cases (00:57:31)
Polish Bitcoin Association and Government Perception (01:02:46)
Government Digital Signature and Privacy (01:04:32)
Privacy and Bitcoin (01:05:44)