So just for curiosity sake,
I really want to know what would have been the outcome if actually everyone stopped selling their Bitcoin and instead held on to it and the reason is because it's so tiring whenever you hear people complain about how someone have maybe made mistake by actually using or selling their Bitcoin but and am always suprised at this because Bitcoin itself is a currency that it's initial purpose was to be centered on decentralization and financial fairness but as it grew it's value or ability to be used as store of value have made people think that anyone who sells his Bitcoin is actually doing wrongly.
There is absolutely no way everyone would have held unto their bitcoin without a single person selling, and the reason being because different people buy, invest in bitcoin for different purposes, some do buy/invest to hold for the long term, while others buy/invest to sell in the short term, and there are those who buy bitcoin for the sole purpose of selling it off immediately they realize a small profit on top of their capital, we know this ones as day traders.
So, the thing is to invest or buy bitcoin and treat it based on your own plan and careless what other people are doing with their own bitcoin since they treat it based on their own plan too..
There can never be a time when everyone will hold unto their bitcoin with no one selling, not now, not anytime in the future, except if and when bitcoin is dead and people hold nothing but shitcoin in their wallets.