Proof Of Work Vs Proof Of Stake

51% hashing Power Also means A lot of money probably much much more than 51%ethereum stake because to run that 51% hashing power it will consume heck a lot of energy + cost to aquire that amount of hashing power which has to be upgraded every year.
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For A government To corrupt A Blockchain It is much easier to stake 51% stake in a coin because they can print unlimited amount of money and stake it.
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But its a lot difficulty for a government to aquire 51% hashing power and afford the cost of ELECTRICITY consumption.
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I think A currency Should Always work on Proof of Work like bitcoin.
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And networks like ethereum, cardano can run on Proof Of Stake.
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If Today a government decides they can acquire 51%stake in all POS networks they can really do that ,but not Bitcoin.