I don't think non-central exchange is useless. There are a lot of traders participating in decentralized trading floors to hunt for cheap tokens and surf easily. I and more than 20 people in my group are still surfing at decentralized exchanges and it is quite effective.
But the problem here is that Binance's security is as certain as it was at the beginning after it was decentralized. Investors believe in Binance because their security system is good, and this decentralized news seems unlikely if it encounters any minor problems.