3. In the past 10 years, there have been more than 30 incidents of theft of centralized exchanges. Because DEX exists in the computer network, attacks have become more difficult. There is no single point of entry or single point of failure, making DEX security exponentially improved.
DEXs are not safe from theft or attacks though. Most of them just don't have enough volume that can incentivize hackers to attack them. Etherdelta was a huge decentralized exchange in 2017. At it's peak, hackers found away of hijacking some DNS servers and stole people's money through a
phishing attack.
Bancor network another "decentralized" service got
hacked in 2018 and $23.5M worth of coins were stolenThese are just a few of the examples I have picked. I believe there are many more.