What do you think is the most happiest thing?

Everyone has a dream. , seems to be with. Someone wants to have a lot of money, someone wants to have a room their own place, and  someone wants to have a car. It is a matter of fashion nowadays. The youth are not so down-to-earth. Why?

Everyone is actually singular! Some = some of them, therefore use the verb for they. Someone sounds a little odd, as if you were picking at random examples.

Dreams-come-true always make us happy. We work hard for them and get what we were looking forward to, but make a kidding we are only fooling ourselves. Nobody shares them with you and nobody understands you, so you only share your success with yourself. imagine Think about it.

Pay close attention to how I corrected the punctuation. Sentences need to be clear.

I think the happiest thing in the world is when there is someone who knows that you are really happy. That is my personal opinion.

Not bad!

what do you think is the most happy thing

everyone have a dream , seems to be with.someone wants to have many money ,someone wants to have a room ,someone wants to have a car , it is a matter of social nowaday .the young are not the down-to-earth.why ?
dream-come-true always make us happy ,we work hard for it and recieve what we looking forward ,but make a kidding ,nobody share with you ,nobody understand you ,you only share your success with yourself,imagein .
i think the happeness in the world is there is someone who know what you are really happy . it is my personal openion .