Bitcoin was founded in the year 2008. Since then, there has been no major damage to the Bitcoin network. For nearly 30 years, the internet has proved to be a reliable resource. It's a track record that bodes well for the future of blockchain technology.
In the same way, as the internet has built-in robustness, blockchain technology does as well. The blockchain can't be managed by any single individual since it stores blocks of information that are similar across its network.  There should be no single failure point in the blockchain.