One of the most important feature of cryptocurrency is its being irreversible. One the coin is sent, the only way for it to be back to the sender is if the receiver will do the same thing in reverse. Now, in cases of hacks, scams and frauds, it means that you better forget what you already lost as there is no way for you to recover the lost coins.
This irreversible nature of cryptocurrency is one of the weakness of it that make people to find it difficult to adopt and use cryptocurrencies. In as much that this is weakness, it is also a strength because it makes users to be more careful whenever they are either sending or receiving funds. It also makes users keep their private keys safe from any third party since transactions made are not reversible, the third party can easily steal your funds once they get a hold of your private key....