Investing over a multidecade time frame can be incredibly difficult because we don’t know what the future holds. Need proof? Three of the market’s beloved FANG stocks weren’t even public companies in 2000. While there is a pretty good chance all of these stocks will be great wealth-generating stocks over the long haul, there is no guarantee that some company five to seven years from now won’t completely disrupt them just like they did to so many others on their ascent.