A healthy investment portfolio should hold many different stocks for a long time. Here at the Motley Fool, we recommend selecting 25-30 high-quality stocks and letting them grow for at least five years. Those are the most elementary principles of portfolio management, and I wholeheartedly believe in this philosophy.

However, every great journey must start with a single step. What if I had to start from zero today, picking a single stock to start my long-term investment strategy?

I think Amazon.com (NASDAQ: AMZN) would be a great place to start. Here's why.

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Source Fool.com