This is a point that I would like to address. Facebook, on its own, will very likely die. They already had to buy Instagram, which fortunately was a very good move. They also bought WhatsApp, which they will likely find a way to monetize since they are apparently going to be reading messages. So Facebook as a company might stay current because it keeps absorbing new platforms or technologies, unless TikTok of course climbs to the top, but the Facebook website as we know might not be used as much. Heck, even the desktop version of FB quickly grew out of fashion as more users moved to mobile. FB was lucky to have stepped up their "app" game just in time.
But Bitcoin cannot grow and evolve like Facebook can. Its essentially stuck where it is with high transaction costs, and low transaction speeds. Perhaps the only thing it has going for it is the fixed supply, but nobody is forcing anyone to use Bitcoin. Most companies only survive because they adapt, but I don't see how Bitcoin can follow this same path. You could even say the dollar adapted because it went digital once consumers used mostly credit cards and online transactions. The dollar also adapted because one day it was backed by gold, and then it wasn't. It was also tied into the price of oil, so that too had a dramatic impact.
But Bitcoin cannot adapt in any of these ways. I honestly would not be shocked if one day, a major effort is put forth to make people switch to something new, and just like that, it can fall out of fashion.