To my own reason on how best the Dex and the CEX  offers convenience services is based on users crypto plans that's if you're holding for short or long term.
Quite noted that bitcoin investment is better if Investors are on the troll of long term and also noting the limited private keys in the CEX while the Dex gives you all private access keys, it's better for investors to store their bitcoin in the Dex so to take self responsibilities of the asset securities and hodl since you aren't selling your bitcoin in a close time.
While crypto traders could better to store their funds in the Cex reasons being that it helps to facilitate on quick transactions using the p2p for trades and also economical to minimizing transaction fees as much as trading could be of everyday transactions.