Not keeping your assets on the crypto exchange is absolutely an old, unwritten rule that has been echoed by almost all of the people in crypto communities. "Not your keys, not your crypto" is a slogan that makes me want to invest in a new project that claims to be a solution to how we trade nowadays. Both CEX and DEX have their own weaknesses, and these projects claim themselves as "the first shariah-compliant hybrid exchange," offering new ways to trade by keeping our assets and holding them in our own wallets (non-custodial) while trading in the CEX efficiencies. I hope it truly could solve the current issues since we've lost our money by trading in either CEXs or DEXs in the last few years. I hope HEXs will be popular in the next couple of years.