首先我看不见你发的图片。其次你的句子有问题。你应该问:为啥我梦见了这个符号?(Why did I dream about this sign? )或者:你们怎么看待这个符号?(What do you think of this sign? )而不是:你们为啥梦见这个符号?(why do you dream of this sign)
(Firstly, I can't see the pictures you sent, and secondly, You should ask: Why did I dream about this sign? Or what do you think of this sign? We didn't dream of the sign. You dreamed it.)