Blockchain is amazing right? Yan ang tinatawag na secure. At ung mga address pa its hard to tell who owns them. Blockchaon is not hackable it is very hard to do that on blockchain. The only thing hacker can do is hack your system get your private key and address.
It is susceptible to 51% attack that can cause double spend, or reversal of transaction. there is no perfect technology, each one have its own bug and glitches. There is far more worst case of Bitcoin exploit but I can't recall where I read it.
Here is some list of Bitcoin Weakness:
Wallet Vulnerable To Theft
Tracing a coin's history
Sybil attack
Packet sniffing
Denial of Service (DoS) attacks
Forcing clock drift against a target nod
Illegal content in the block chain
Security Vulnerabilities and bugs
Energy Consumption
Breaking the cryptography
Scalability
Segmentation
Attacking all users
Dropping transactions
Attacker has a lot of computing power
Spamming transactions
The Finney attack
Rival/malicious client code
You can read the description
hereYou can assume that, no matter how perfect a technology looks or portray, they will always have glitches and bugs that can be exploited by hackers.