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.
Its upto the thinking of each ones. but in most country still bitcoin is not usable then they have to convert it to fiat currency so that they can clear their problems or daily needs,
I use bitcoin for my regular use like mobile recharge and online purchasing,