All the other investment options you mentioned are relevant but I don’t think, a core bitcoin investor would want to sell his coin simply to go invest in some other things not even this bull run.
But why not? Diversifying makes good sense for investors. Putting money across different assets like Bitcoin as well as more traditional ones can help manage overall risk. No one knows for sure where Bitcoin or any other market will go long-term. betting everything on one horse seems unwise, even for big Bitcoin bulls.