I see how this could be useful, but only if you are lucky enough to discover that someone is in the process of emptying your account. It would also help if you mistakenly connect you wallet where you shouldn't have. Obviously, that other person would have to do it manually one coin at a time. Usually, people wake up to discover their wallets have been emptied. If a service like this is available to help protect your account against hackers, the same fraudsters could also use it to empty your accounts faster. Unless, of, course, they don't have even better bots and automated software.
This is a lazy way to transfer your tokens from one wallet to another, you could be using it and recommending it to your friends without you and your friend properly educated on the risk because originally we transfer our tokens from one wallet to another by manually doing it, a new application even if its open source can have an update and upgrade and it could have a back door to hack a wallet.
I don't know its potential but I prefer to do things the old and safe way.