Because it's easier said than done, and history has proven that. Not many investors could hold bitcoin for that period of time, only a few could. In particular, holding bitcoin 10 years ago was much more difficult and challenging, as bitcoin was not as popular as it is now and was even considered a scam or trash. So holding on has never been easy.

Unlike today when things have become more clear and many people are starting to brag that they can hold bitcoin for a long time or will hold until the price reaches $1 million. But I bet not many people can hold out that long even if everyone believes it will happen, because there are hundreds of things to worry about in our lives, not just accumulating and holding bitcoins. There will come a time when we have to sell bitcoin because of life, not because we no longer believe in it.