Owing depts is like being enslaved until you've paid off... And owing unnecessary loan can be very hard to pay off keeping you in an unhealthy financial state.
What I'm saying is never you borrow to invest ... It's unhealthy.
Credit cards are offering benefits and points and that's why people who own that like them. As long as you're a wise and disciplined spender, you'll not have any troubles with it. And I'm against with taking loans just to have an investment, it's a big no for me. You only invest with your own money and not with someone's money even if you're okay to pay with interest on it. Instead of taking a loan and paying its interest, just save a little by little and use that money as the capital you want to be so that you won't have any burden if your investment is unsuccessful.