You can say one thing about investing in mining stocks, it is rarely dull. 2014 and 2015 were nerve-wracking, 2016 and 2017 packed with fun. BLT, please If you look beyond that and invest for the long term, the buy case is strong. Most investors should have exposure to this sector and growth monster BHP Billiton (LSE: BLT) is a good place to start. The stock is up 146% over the past two years, driven by the sector’s spectacular recovery since the January 2016 China meltdown.