If you are asking about extending incountry, you need 800k in a Thai bank account OR embassy endorsed income verification.
And current health insurance.
IF you are in the 1st year of OA you can exit and reenter just before it expires and get another year (not multi entry for the 2nd year) providing you have Insurance for another year.
If you don't want money in Thailand then you would have to reapply for a new OA outside of Thailand.