"Fat" Happy Buddha
Maitreya Buddha is the future/hopeful Buddha.
Who is actually technically a Bodhisattva.
Laughing Buddha, Fat Buddha, Happy Buddha, is often mistaken for the historical Buddha.
Throughout the history of Asia being fat was associated as a sign of Wealth, Health, Prosperity, and Happiness since the common populace had limited access to food and thus were accustomed to being poor and under-fed.
When this form of Maitreya Buddha is understood, he is supposed to encourage a sense of Hope and Optimism.
Since he will bring "Wealth" to the world, when the world has forgotten the Dharma.