The answer is in our hands,if we continue to sell the bitcoins the it will die soon so we need to hold as long as the the demand of bitcoin gets increases which increases the price also.
So people or investors just hold your bitcoins to make it alive.
If you just hold Bitcoin, it will have no function and no reason to buy it. It's worthless unless it gets spent. It's not like other investments that produce cash flow. This is one of the reasons it could very possibly fail. There's just no intrinsic value in it.