Finding an investment that could go parabolic within a few years of purchasing it is a hard-enough feat. Making matters even more complicated, the real battle may be hanging on to a booming stock for the long haul and not selling too early.

All too frequently, investors receive a quick 50% or even 100% return from a stock and happily cast it aside in the name of "making a quick profit." Though these short-term profits are authentic, investors must remember that they might be throwing away a business in the early chapters of a tremendous growth story.

However, Progyny (NASDAQ: PGNY) and Doximity (NYSE: DOCS) are companies I am confident I won't be tempted to sell should they go parabolic soon. Home to market-leading positions in their respective niches of the healthcare market, these transformative businesses operate at the heart of two robust megatrends, making them super stocks to buy and hold for the long haul.

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Source Fool.com