correct me if im wrong base on what i have read...blockchain connects one thing to another...my question is what if it was hacked or it was bugged? do all the informations were safe or will it be sustained?
Blockchain systems are unhackable (so far). We know this because Bitcoin is worth Billions of dollars and has been attacked by the most sophisticated hackers over the course of the last 9 years. Nothing has happened yet and bitcoin has been running just fine 24/7/365. As far as bugs are concerned, Bitcoin has bugs currently and has had them in the past. There was a leveldb bug many years back. In the event of a major bug in the network, the network can be hard-forked to resolve the bug. This should only take place though if it is a very, very serious issue. A perfect example of a more recent bug in Bitcoin was a bug known as transaction malleability. The recent Segwit soft fork actually resolved this bug and the network experienced 0 interruptions during this upgrade. From a computer science point of view, that is simply amazing.
Blockchain technologies aren't unhackable, instead of the cryptographic that power the blockchain is the things who unhackable. If somehow the blockchain itself using a weak cryptography method it will become more volatile to cracking. Then the blockchain itself has a higher chance of being flawed.
