Bihar also has huge amount of water while Maharashtra sees drought every year. But you cannot compare gold with other resources as Gold is a monetary asset and is important from any countries financial stability perspective.
If you are specifically talking about Bihar then that state has the potential (It was once situated very close to Kolkata which was India's capital) and needs to make better use of it's advantages rather than getting into things that are constitutionally not under their domain.
By your logic Maharashtra would have been the most backward state as it has almost no natural resources, very miniscule water, terrain that is not suitable for farming etc. etc. and yet it is the number one state in the country as it focused on industrialization.
That being said it can be taken over by other states if they play their cards right and Maharashtra goofs up big time over the years (which I believe is happening as we speak).
en.wikipedia.org