Binance and many other exchanges are SCAMEERS they are INVOLVED with LUNA SCAM
They didn't delist till it drop to ZERO even that they know LUNA devs was creating
What do you expect if all exchanges delist Luna? Do you want all Luna holders to have no chance to sell them again?
Anyway, those exchanges have no responsibility for the drop in crypto coin prices. They only facilitate people to trade the coins on their platforms. If there is a big drop in Luna price, you should ask Luna founder or the team. They are the ones who have the authority to explain it. But they also have no responsibility for your losses because they never asked you to buy Luna. You bought it with your own intention, didn't you?
Exchanges are a means of trading of coins, they don't dictate the fate of the coin. Binance, maybe, is too late to delist this coin but who knows, they also have no idea that this is forthcoming to Luna. I don't think the dev team will disclose to let's say for example, in binance, that they are about to exit, right? So I don't think they are involve in this. Remember, it is always your own will to invest on a coin. The exchange is just a means of it, they are not pointing a gun at you to buy a specific coin.
There's evidence that Binance has recommended stopping the network and some other things but after hours of noncompliance they decide to delist Luna it's not Binance fault they have given Luna's team to act but it took them hours to act until the supply grow further, blame Luna but never Binance, they have done what should be done.