And the more stories peoples hear about declined or "frozen" bitcoins, the more they will start to look what can be done about it. That's where fungibility will chime in and lead most to Monero.
If we would imagine the more and public exposure Bitcoin gets during the bull runs, the US Congressional debates, the regulations governments put on exchanges; while also a huge global economical recession/depression coming up in the near future (1-2 years)... the more people with massive wealth are going to look/get their feet wet with reallocating their assets to Bitcoin & gold, probably.
Only then will it be more public knowledge of the issues of storing wealth in something that is not fungible, because surely there will be a time when one of those people who bought Bitcoin off of someone else (not a central exchange) and put those coins on a centralized exchange, and will be denied for whatever reason due to their level of taint.
... word amongst the elite class travels fast after that I would think.
The more BTC gets to be more adopted by the mainstream, the more the establishment would crave to control it. And the BTC blockchain's transparency won't be any help... That's where XMR comes in.