Why is Lord Vishnu mostly in the sleeping posture, however every other god is usually seen sitting?

Why is Lord Vishnu mostly in the sleeping posture, however every other god is usually seen sitting? Yog Nidra : According to sacred texts ; Lord Vishnu undergoes Yoga Nidra for a certain time of a year. Seers and devotees believe; it is his provable way to remember Lord Shiva , his beloved deity. Many devotees believe ; Lord Sri Hari recharges himself to create; sustain and destroy world. Chaturmaas : It is known as Chaturmaas (four months) ; when all auspicious acts are forbidden. Hindu monks do not travel during this specific period and indulge in meditative prayers. Anant shesh : Lord Vishnu reclines on Anant Shesh ji - his divine serpent. Anant shesh happens to be among the greatest devotees of Lord Sri Hari Vishnu. He epitomizes Kundalini Shakti (mystical powers) and utmost devotion. Powers : Anant Shesh guards Lord Sri Hari against all form of negative energy. It also acts as couch ; cover and fan for Lord Sri Hari Vishnu. Devuthani : After four months ;Lord Sri Hari gets up from his divine sleep on Devuthani Ekadashi. Naturally, all auspicious deeds start from that day. Facts : Lord Sri Hari not only sleeps ;but sits on his couch. All deities have personal symbols -Lord Shiva’s Baghambar (tiger’ skin) ; Goddess Durga’ lion.) Each symbol in Hindu philosophy has a specific and subtle meaning. Prayer : Sri Ganeshaya Namah Jai Sita Ram Narayan Jai Sri Lakshmi Bhumi Anant Shayanam Narayan Namo Parvatipataye Har Har Mahadev Shiv Shambo