It's perfectly reasonable to bring up the fact that Gaddaffi, Saddam and all sorts of other characters suggest moving on form the petro dollar.
It's not covered by mainstream news, because it's not really a news item.
It's also reasonable to suggest that this will catch the ire of the US and their diplomatic corps, but it's really not an important thing.
It's 'conspiratorial' to suggest that this was in any way a primary reason for killing Gaddafi.
Gaddafi was already getting increased investment from many Western firms, and the US was literally looking to pass his public image to the extent that he provided reparations for Lockerbee and stopped acting crazy. Everyone was keen on 'being normal and making money'.
But the Arab Spring happened, and he made public statements that went to far, people feared the worst and that was the straw that broke the camels back.
The decision to intervene was barely a consensus, nobody really wanted to do it, Obama was super reluctant.
If Gaddafi were to have made a different public statement about his intentions, and were to have signalled in some way that he was unwilling to commit to blood or something ... he would have suppressed the insurrection and probably be still ruler today.
Qatari special forces that ended up killing him were only able to act because of the various forms of American cover and intel. support and of course the chaos of the war with him on the run.
The petrodollar is an important part of American foreign policy and they will get 'really mad' if people try to move away from it, but that's a far cry from the conspiracy stories.
Also, BTC is a giant distraction from reality, it serves to fuel hype and headlines as much as anything.