I would say that both are important, if you ask me. Investing you will have chances to increase your capital, and could gain experience in the market. Having savings you will have a better life and be able to deal with situations where you need that.
Since we are in bitcoin industry, both of this choices applies to one activity and that is by holding. And it is good that if you just want to save but at the same time you have investment with those savings, you can just do it alone by holding bitcoins. Because as you save and waits for the price increase, the possibility of getting profit is high.
This is our opportunity to make money or if possible to be rich as we are here in the early stage of bitcoin, there's more room to grow for bitcoin here therefore we should learn how to take the risk. Instead of just spending our bitcoin, we should also learn how to invest and by holding our bitcoins in a longer period of time, it will already give us a guarantee once success will continue and it will grow into a substantial amount.
Investing your money and saving it later won't be enough to make you rich, as you did not take any risk on your investment. If you want to get out of the rat race. But if you are lucky there are certain types of investment that can really make you rich all you need is a careful study about it and time for it to appreciate. But keep in mind don't invest your bitcoins directly as you may often fall into a scam, you can convert it to fiat and find a good amd real investment in the real world.