https://www.bloomberg.com/news/articles/2018-02-09/jim-rogers-says-next-bear-market-will-be-worst-in-his-lifetime (2018-2-9)
https://www.youtube.com/watch?v=eq01lq25xHk
http://news.ltn.com.tw/news/business/breakingnews/2425421 (2018-5-14)
https://www.youtube.com/watch?v=QXalc1mq2Wk
