What made him buy, belief. He believed in the idea of bitcoin and assumed that it would be a great investment but also a great way to show support for something that he finds ideally great, and that is why he invested. Now that he believes in bitcoin, he will not sell it and thats fine. However, if one day he starts to question bitcoin and thinks that it is not a great investment or not a great idea then we are not going to see him keeping it.  He talked about how it is not good for the climate because of the energy usage, and that could be one reason why he may end up not keeping his crypto in the long run, or maybe he will, we do not know. It will not come down to finances, it will come down to ideals.