None of the exchange is safe, even the big names went scam in past.
Moreover, there are exchanges out there which although not wholly turned scam but are operating very shady such as HitBTC. So it is always preferable to use exchanges only for trade purpose, never ever hold funds on them. Also there is new trend growing among exchanges i.e. launching their own coin. Now I find this thing to be very risky for investors. Exchanges are already earning entities through trade fees, throwing them extra money by buying their coins is not a good idea from investors point-of-view. This model may survive in case of one or two big exchanges such as Binance (BNB) and KuCoin (KCS) as they have first-mover advantage but for other exchanges which are now adopting this idea, it leads to creation of liability which is not backed by any additional service. Moreover to lure investors, they promise fees sharing. All these things will backfire in future and such model will collapse.