Can You Retire a Millionaire Using Only a 401(k)?

Retirement can easily cost $1 million or more, and some people might need to save $2 million to cover all their costs. It can feel like you'll never get there sometimes, even if you're dutifully putting money into your 401(k) every pay period. But there's good news.

With the right savings strategy, it's possible to retire a millionaire using only your 401(k), but that doesn't mean this is always the best approach for you.

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Source Fool.com