This would be beneficial for all long-term investors who have many different cryptocurrencies in their portfolio and don't usually perform any transactions. Simply just to check whether your money are still there. No need to login into all your wallets, entering passwords etc. With support for many different cryptocurrencies.
I have just decided to develop such an application for my own use (it is open source, you can check it here - Cryptocheck ), but maybe there is already a good solution for this.