Never ever keep your Coins on centralised exchanges. All CEXs are based on old traditional IT infrastructure and the funds do not sits on the blockchain nor they can create high secure environments. The limitation is their centralised business structure.

In all this years they could come together and use the money they rip off from customers to create one Exchange chain or invest in decentralised tools that will serve everybody.

This fact should give you a sign that all of them are only for profits and not for innovation nor they want to see this space to become adopted in the world.