In order to get SSI or Medicaid, you can only have a certain amount of money or property ("resources"). It is helpful to understand why there is a resource limit for SSI and Medicaid before thinking through how it works.
Generally, SSI and Medicaid are for people who can't afford to pay for their basic needs with what they already have. If you can pay for your basic needs with what you already have, you may not need SSI and Medicaid right now.
Not all resources are treated the same. For example, the things you need for everyday life, like a house, a car, clothing and household goods, are not counted as part of the resource limit.
The rules about the resource limit rules are complicated. This provides only a general explanation.