Always be prepared one day the electricity will stop if your phone isn't charged well and you don't have the need stuff you will get bored very easy. For example you can't read a physical book, you will need a torchlight, but if you have a book on your phone you can read it also you can listen!

If I go outside, I will be prepared but you inside and outside will stuck again and again without a gain!

You ain't prepared for what's next, neither for what's commin.

Always be prepared!