Both. To invest you need to have some saved up and it's a bad idea to invest the money you're living on.
If you're really afraid of investing do yourself a favor and don't keep your savings in a bank. Buy a good safe or a piece of land that will work as both a store of value and an investment.
I agree with you, you need to invest to earn a little profit on the amount you have been invested. You may also keep it, but bitcoin when the price is low and save it, as time passes by as bitcoin value started to increase the amount you have been save will increase as well.
Investment should be only a percentage of your profit and the rest are for your expenses and savings. In terms of investing, bitcoin is good yet you may try altcoins also specially those coins which has a potential to increase its value hugely.
When you invest you need to learn how to diversify, investing in altcoin is one way of diversifying your investment, others may think that it's risky but if you will take time to study, you will find good altcoins that is worth for your long term investment. For me, aside from bitcoin, I will love to invest long term in ether also, I believe it will reach at least $100 this year.
