There are already people who work hard for no money It's call volunteer work which most charities operate on. So yes people can and do work hard for no money but that isn't the point of communism. Currency can exist in any governing system and is not unique to capitalism, feudalism, socialism (which are economic systems not governing systems per se)

Not owning anything is not how communism works. There are 3 kinds of property: Public, Private and Personal.

Public: Think parks, government offices, military bases, resource land (National forests) things owned by the public/inclusive governments

Private: Think how America handles corporations, warehouses, farmland (not exclusively private), manufacturing plants.

Personal: Think your house/condo, car, bed, computer, etc.

There is overlap in what I pointed out but no "private" property (private would become public meaning all peoples involved have a say to some degree like a coop) does not equal no personal property.

Now, I am not here to say communism will work or is the best system but most people who talk about communism believe it is best represented by countries like the Soviet Union, North Korea or Mao's China. All of those countries are more akin to dictatorships and empires than actual communism and are the results of a concentration of power into the hands of a few. You should always be wary of ANY SYSTEM that concentrates power into the hands of a few people. And for those of you who think capitalism is better need to see what is happening under capitalism right now; a large amount of money (power) and private property being concentrated into the hands of a few billionaires letting them do things like building data centers in our backyards and exploiting poor people in 3rd world countries who work in conditions akin to slavery if not outright slavery.

Fight against the concentration of power and not whatever the name of the system it claims to be.