I disagree with the statement of the OP , If ever we all HODL our bitcoin so it means the supply in the market will go low but since the demand is high they will start to increase the value of bitcoin and that is the time bitcoin will pump and that is the right time to sell.
Then what's the purpose of having a bitcoin if you're not gonna use it? Bitcoin was made to be used so by just holding it then it will be useless. Hoarding will happen if that concept is going to be embrace. Bitcoin must circulate to be full functional or else it would just be a collection. You must sell it not just hold.