I'm going to ask my husband to put his dreams on hold
Is there something happening in your life that would make him need to do that?
Nothing at the moment but I've told him to come back down to earth before and he ignored me.
Wanting to be grounded and down to earth is normal but you should never ask your partner to put their dreams on hold, especially for no reason. As his partner you should be trying to support him and lift him up so he can try his best to achieve those dreams.
He should focus on home and family...
Don't you think he can try and attain his dream and still make family a priority? You may be more secure if his dreams can lead to financial success.