Question about holding onto a stock

I bought some Microsoft stock when it was at $212 (only 4 shares, nothing special). It's hitting all time highs at around $420 now.

Now that it's almost doubled, should I go ahead and sell it and drop that into something that could potentially have more growth at this stage?

4 shares isn't much, and the dividend that comes with it amounts to next to nothing.

This is in my Roth.