Binance is a centralized exchange, so it could be the best in this category, but when we are considering the decentralized exchanges, we can make use of bisq or hodl hodl crpto exchange, maybe we should also go beyond their global recognition and focus on the benefit and danger in choosing any particular one for our own choice, and this will bring about looking at the difference between a centralized exchange and a decentralized one first.
A decentralized exchange is recommended because it's not centralized and unlike exchanges like Binance which are centralized, so you don't have full control.
But whether both of these are safe, it can also be said to be safe, depends on how committed the exchange or DEX is to its users.
DEX will also not always be safe, there are some problems that can arise.
The safest is for investment, store it in a hardware wallet that has better security than other wallets.
Related What are the best exchanges, tier 1 exchanges like Binance, Coinbase, Huobi etc.
It's an optional option, but I've been a Binance user myself from the beginning of Binance until now and it's still pretty safe.