There are many good reason why it's good to have some BTC here are some of the list why it's a good reason to own some bitcoin.

1. Like what you've said if you lost your wallet you can access to a online wallet to withdraw some bitcoin (The bad thing here is that bitcoin is not a universal currency some of the countries didn't recognize bitcoin.)
2. Once you have bitcoin and you hold it, soon you will become rich.
3. You can pay others whenever they are and the transaction is very low.
4. Fast transaction.
5. You can have bitcoin whenever you want, wherever you are and whoever you are.

So far here are my ideas why it's a good reason to own some bitcoin.