Probably it is the upcoming halving. Just like the event of litecoin halving last year. It is normal. Bitcoin and altcoin's price movement are in the two directions.
Ehhhh, don't know about this. I do think there's a relationship between btc and all the shitcoins but I suspect that it's not a simple one. And I'm not convinced the price movement of late has anything to do with the halving. If movement happens before the event,
it is being priced in. And who's to say that that hasn't already happened??