There is a considerable (and growing) amount of freely available content on the topic of crypto-currencies, blockchains and ‘trust-less asset management’ in general.
The challenge is where to start – not so much to understand the technology itself in-depth, but to understand what opportunities and innovations the technology could give rise to.
A key book to read to get started is by Tim Swanson: The Great Chain of Numbers
The start of the book can be found on Tim’s blog here, as well as links to various download formats.
An excellent read on a fascinating topic.