What makes Blockchains safe?
The security of a blockchain is strongly connected to its decentralised nature. Decentralisation means that there isn’t one single point where all transactions are stored, unlike in a bank for instance.
Every piece of information is divided into “blocks” , so it’s impossible for someone or something to hack into a blockchain and potentially steal your information and cryptocurrencies.
To this day, the Bitcoin blockchain has never been hacked or overtaken.