Is bittrex more or less safe compared to other exchanges?

i use bittrex a lot
recently I was warned that exchanges can be hacked too.

is bittrex using good security?
or are other exchanges better if working with lots of coins?

all the exchanges are the same… we don’t know their internal security, so for the end user it is just a black box,

so I think, the best is to keep your coins on a wallet control by yourself, and keep on exchange only the coins you will trade.