1.- A Hacker News for _______ (finance[1], bitcoin[2], architecture[3], etc)
2.- Filter Hacker News (exclude ___[4], by tags[5], etc)
Food for thought.
[1] https://news.ycombinator.com/item?id=6844565
[2] https://news.ycombinator.com/item?id=6867232
[3] https://news.ycombinator.com/item?id=6860611
[4] https://news.ycombinator.com/item?id=6866403
[5] https://news.ycombinator.com/item?id=2563739 (expired link)