I have an idea on how to automatically add coin balances. The coin's wallet address could be used to monitor it's balance. The balance could be calculated by scanning the coin's blockchain. This would probably be a pretty big task for the servers. Maybe a limit on scan intervals could be set?

Or instead of rescanning the entire blockchain for every balance update, there could be a single task of monitoring the blockchain in realtime that could update all users' balances. Then when a user's address shows up, it applies that value to the user's balance. This way there is no redundancy in reading the blockchains, and everything is updated automatically and in realtime! All the user has to do is give the coin type and wallet address, and then they never have to update again!

Is this a possibility? My roommate keeps asking me what my portfolio value is, and he has no clue how incredibly complicated it is to compile when I have several coins scattered across several accounts. I'm sure we all feel this way!