Does it have to do with server?
Generally, yes. But technically, it shouldn't behave like that regularly providing it's a crypto trading site where having good servers is highly necessary. Unless some sort of direct attack is currently on progress, it should affect the site performance as a whole.
Now for the site you have mention, it looks like they aren't trading sites nor can we consider as a
"safe" place to put our money. I don't know how you ended up on the site as it's not common for a person owning an around
BTC1.8 or more to just put it anywhere without caution unless you have another purpose of creating this thread.
I hope you are not trolling those sites here because I doubt someone will fall on those.