~snip~
That effect of Elon Musk got worn out over time. In the beginning when he tweeted about Bitcoin, I think it was to be expected that the market will move or that at least some big players might have used the momentum of that tweet in order to pump the market and get excitement going on a global scale. When the richest man in the world with such a massive following out of a sudden starts to make moves in an industry, I think it is normal that there is going to be some serious momentum. It won't happen again though solely based on his tweets. Tesla accepting Bitcoin was also quite the step, but only in that specific situation.
Regarding the halving I believe that that will be priced in once again way earlier than the actual halving is going to happen.
Famous people or mainstream media saying things are basically noise in the long term.
The halvings are kinda in the middle term, they affect the price and how confident people feel about Bitcoin. The more of them, the better for Bitcoin.
We will see in a few years the big change that will be having the rewards as less than 1 Bitcoin, that will be interesting to see.
It will be more interesting to see the block subsidy dropping below block fees (2040 -> 2044).
We still have a long way to go...