That would be really weird to just keep on holding and not spending it, spending bitcoin is a fun, I sell my coins when I feel that this is the good price as if there is price drop in future then I would regret for not selling at a right time.
I'm talking about selling it, means converting your bitcoin to a fiat. And I'm not talking about spending. Of, couse there's noting wrong in spending your bitcoin this will not affect the value of it. But if you sell bitcoin to a fiat. It's no difference in making the demand of bitcoin low and increasing the demand of fiat.