They both good i think save some and do invest 10% of your money because save money is very important to individual we need to save money for our future. Saving is good but we need to invest sometimes because we need an extra income. But choose wisely where to invest your money because many investment site today is scam.
Both choice is really a good option. You save money and you have some investments. This is how makes someone successful in life, he knows how to take risks by investing not only with one thing but as many as he can with his capacity to manage. And when he earned out of that money investment, he's directly putting it to his savings.