Blockchain's decentralized nature, transparency, and security have proven valuable in DeFi, NFTs, and gaming.
What do you need to know is not all blockchain has decentralized nature, transparent and secure.
Binance Smart Chain is the example of centralized blockchain because they only have 21 validators.
Monero is the example of private blockchain, there's no way to track which address send the coins or which address received the coins if you don't know the public address.
Many network have been hacked, check it by yourself.