yeah, many people think that selling is now a stupidity, but they know that each person holds some different coin. And the bad coin should sell early is a natural thing
Its not wrong if an holder decides to sell.
What's wrong is if he sold during the wrong timing. We hold different coins and we have the authority to do whatever we want to it. Take profits as early as you can and just buy back if you think that its still worth to hold that coin. Make your decisions firm and don't be discourage if others thinks that you're not doing well.