There are 80+ million ethereum. A staking node requires only 32 eth to stake. If even just 25% of the 80 million started to stake, that would create 625,000 staking nodes. If the reward is 1 eth per minute and split among even just 100,000 nodes. Its not worth it to stake anymore. What is the proposed staking reward per block?

And is there a min and max of how much a user can put in a ethereum staking node?