I believe that people that use CCs are at the lower end of the spectrum.
People that earn 100% of their income from the W-2 (employee status) jobs often have non-morgage consumer debt.
Car payment, mobile phone contracts, and Credit cards.
The few success stories I know of are people that bought and were able to get Capitalization Rates for positive cash flow quickly, or immeidately.
This is what separate the financially secure, and future financially secure, from 90% of the U.S. population that is:
living in owner-occupied housing.
has consumer debt
a 401K
mutual funds
will depend on the financial markets and welfare when they are old
Mutual funds are for people who basically don't know what they are doing. The recent reports for the last 20 years are absolutely awful. I have 11 funds that I've carefully chosen. But mutual funds are a poor man's game.