It seems like stock market investors have never been more optimistic. Major indices are hitting fresh all-time highs, and companies that were left for dead by shareholders are bouncing back.

Take Uber (NYSE: UBER). The growth tech stock was underwater for early investors until the business posted better-than-expected fourth-quarter results on Feb. 7. As of this writing, shares are up 29% this year alone.

Should you buy Uber stock hand over fist with $100 right now? Let's consider some bull and bear cases for this ride-hailing and delivery enterprise.

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Source Fool.com