What is the essence of having bitcoin when you don't sell it?? Normally you would always hear people say don't sell your bitcoin,  this doesn't mean you won't sell your bitcoin at all, it is just an encouragement for one to hodl bitcoin for sometime because doing this is the only way you can add value to your bitcoin.  Bitcoin is a volatile asset and one of the reasons why people get bitcoin is to keep it for sometime. If people buy bitcoin and not having any plan to sell then their is no reason to have Bitcoin because keeping and never to use it in the future is like having nothing and their is no sense in it.

I think it would have been better for you to make some research to have good understanding of what it means by never to sell bitcoin, it just means hodl for sometime to have profit before you decide to sell bitcoin.