Binance is an altcoin exchange not a bitcoin exchange so it shouldn't have affected anything. not to mention that the momentum is there so you can't really expect something like that to put a dent in it.
Nope. You are wrong there. Have you checked the Bitcoin dominance? During the past 2 months, it has increased from approx. 50% to the current levels of 58.5%. What happened is very clear. Bitcoin is undergoing a bull run right now, but the alts are still stuck at their previous levels. There is a strong possibility
that some of the amount that was previously invested in the alts are now being diverted to BTC. This may be partially due to the issues with Binance, which is in a very bad state now.
that is not dominance it is just a comparison between supply of bitcoin and the aggregated supply of more than 2500 altcoins which coinmarketcap.com calls "dominance" and the only thing that it shows is how many new shitcoins are being created. when there is a huge increase in their numbers and also some big pumps in the coins with the largest supplies that percentage decreases and when the creation of new coins and also the pump in those coins stops that ratio increases. it doesn't show anything else.
as for the bold part, it would have been true only if people did this:
sell alt for USD then invest USD in bitcoin!
that would mean USD is being invested in bitcoin and pushes its price up but you have to be really dumb to do that! what happens in reality is this:
sell alts for bitcoin
and that does NOT affect bitcoin price at all. the only thing that it does is that it dumps altcoins