When there is a halt in supply of something, it create huge demand and that leads to increase in price, so in essence, if more people are holding 32 ETH for staking, it will lead to more demand and that will push up the price of Ethereum, that is to say, rather than collapsing, Ethereum will only be increasing. From another perspective, Ethereum has grown so much that it cannot just collapse, for it be the top altcoin till date confirms the fact. In the same way, Ethereum team are such a team who are always working on improving their blockchain, this will also add more value to the coin.