You should always have a plan and always research before going for it so that you know when to cash it out for a profit or going to a long term investment for more.

Its also a loss for me when I sell my bitcoin when the market price is around 27k$ but it's not that bad as long as I make a profit from it, it's not always a win and we don't really know what's gonna happened in the market all the time.

Try to invest and then forget about your investment so that you could invest a long time, hoenetly watching your investment day by day is just so stressful: that would make you sell