franlky speaking, its nothing much can do besides trading. no like you can really buy grocery with bitcoin right now, except your country currency is way more volatile compare crypto, it hardly can do anything right now. it might have bigger application in larger scales like international transaction.
There are so many things you can use youth cryptocurrency for. You can use it to pay for services rendered if the person is willing to accept it, you can use it to pay for goods as well and so many other things.
I understand that we are not where we want to be and the market is so young that we have not even seen an extreme real life usage yet, but all that would change gradually as obviously we cannot expect it to just happen overnight.
Personally, I make use of bitcoin to pay my merchants overseas for goods and that has really been able to fill up some gap in transaction problem I have had with banks over the years. That is something!