In this weeks episode we are lucky to have Mattias Geniar back on the show to discuss his experiences delving into Bitcoin and Cryptocurrencies.\nWe start off by chatting about his introduction to Bitcoin, the \u2018bear market\u2019 of 2018 and how valuable the \u2018Mastering Bitcoin\u2019 book is to understanding its\u2019 internals.\nFrom here we move on to the concept of \u2018Code is Law\u2019 and the implications of such an approach, the pros n\u2019 cons of being a developer in this space, and how he stores his private keys (not your keys, not your coins!).\nThis leads us to highlight second-layer scaling solutions such as the Lighting Network, and the confusion around projects reusing the Bitcoin name.\nWe then touch upon the power of Ethereum, its\u2019 planned consensus transition from PoW to PoS, and how different it is developing on a distributed platform.\nFinally, we look at the Mimblewimble protocol and Atomic Swaps, discussing their use-cases and how they can improve the space.