Given the perspective and goals many here to seem to have, I can understand the profit-taking. Have a sound profit-taking plan and stick to it.

HODL what you can.  It's still the same binary outcome.  Either Bitcoin succeeds and the monetary system changes, which it is increasingly every day, and one bitcoin will translate to millions per coin in the long-term, or it fails and goes to 0.  There's no in-between.  That's more clear now than it was back then.

If your idea of taking profit allows for selling then trying to re-buy later at a higher price, that's not a profit-taking plan and you need to re-adjust.