"Is it better to save money or invest it?"
Both. Invest what you would be confortable with losing. Save the rest.
Then how about investing somewhere where you dont lose it but instead you will earn some profits that you can save then?? Like in trading altcoins where you invest your capital after doing some researches of markets and the coins in them and you will generate profits for yourself gradually with it.
Any investments have their own risk. There is no 100% sure profit. Even in altcoin trading, there is a chance that what you researched is wrong and you lose your money. You should always be prepared from some lose if you are investing. You can get great profit but sometimes there are some bad investments. You have to be prepared for that.
If you will never take a risk of investing then you will never make profits and will never improve your financial status in future, to have a better life we need to take risk of investing.