If you spot suspicious transaction what you can do to reverse it back?
In my knowledge blockchain transaction will never be reversed unless and until destination address wanna send it back to the depositor! If you want to create any cryptocurrency it is not at all possible option for you crypto is to secure the transaction with just p2p technology.
None of the people or equal middleman will not be e involved in it.
I don't think the transaction can be reversed but the wallets can be traced back to the user especially if multiple cases of money are moving. I know that's what Ciphertrace's tech does and I think it's much more reasonable than looking to reverse transactions. They are trying to stop them before they happen.
We really don't know what's going to be the case of Libra as it is not a traditional cryptocurrency. Libra will be strictly centralized and its value will be capped based on the value of its underlying assets. So reversal of transactions may be possible. Also facebook will have to comply with thousands to regulatory compliance before they can actually roll out the coin to the market. So again reversal can be a possibility in case of a fraud and theft. In traditional blockchain, we can't do that but not sure about Libra on how they are going to handle such delicate situations.