People say that Bhagavăn Krishna is Moksha (Liberation) bestowing Lord; therefore, for worldly comforts one should do japa of Mantras of other relevant deities. What do you have to say to this?"
Sri Sri Muralidhara Swamiji
Food is the first need of Man. When the Păndavas moved to the forest Bhagavăn Sri Krishna blessed them with the 'akshaya pătra', which never went empty of food. The next need is clothing to cover his body. When the Kauravas attempted to undress Draupadi, Lord Krishna provided her with yarns and yarns of cloth (and defeated the attempts of the Kauravas). The next necessity is a place to live. Sri Krishna got back their kingdom for the Păndavas. Next comes wealth. Lord Krishna blessed Kuchela with immense wealth. When Sage Durvăsa used 'durmantra' (evil Mantra) against Ambareesha who was ever immersed in the dhyăna of Sri Krishna, the Lord's Sudarsana Chakra protected him.
The Bhăgavatam describes Sri Krishna who dances on the poisonous Kaliya as "Akhilakalădi Guru". He is verily the Guru of all Arts. He instructed Ătma Vidya – the greatest of all Vidya (knowledge) – to Arjuna. While Krishna has taken care of all worldly necessities why should one seek another deity's help? Sri Krishna whom you worship will bless you with all round welfare.