Benzinga and Yahoo Finance LLC may earn commission or revenue on some items through the links below. $400 a month. That's how much a 25-year-old Reddit user said he was throwing at his credit cards, and nearly 80% of it was disappearing into interest. It was his version of being "aggressive," he wrote. "But the interest is consuming." With balances barely moving and stress piling up, he started looking at an option many young workers consider but rarely talk about; pulling money out of his 401(k) to mak ...