for this, I would choose both, to save money so that if one day we need, we could use it. invest for can make make money increased
we can do both of them in bitcoin, saving money and invest it at 1place, i think it's a good idea to keep holding bitcoin for saving and investment, because i do it too. it's profitable.
Good for you dude, it is really profitable to hold your bitcoins when you have the right patience because the market can fall back anytime and if you do panic selling, that is when you lose your opportunity to earn more and will result to big lose.