The Four of Wands is Fire (change, destruction, disruption) related to the element Earth (physical items, natural forces, security, wealth, the physical body). It represents weathering by the elements, breaking of physical items, or possibly security breaches.
If it represents weathering, it could represent the natural erosion of the landscape by the elements, wear and tear on tools and decorations, or damages to shelters and dwellings.
If it represents breaking of physical items, it could be accidental or on purpose— out of good, neutral, or ill will.
If it represents a security breach, it could represent robbery, vandalism, or a violation of personal safety— a physical attack. It may also represent any kind of attack which can shatter a person's sense of security.
The Abstract Four of Wands is abstract Fire (discomfort, desire, identification, ego) related to the element Earth (material items, wealth, security, the physical body). It could signify discomfort and desire for skills or material wealth, unsettledness which could lead to a better quality of life in the end. However, such desires could also be the foundation for uncompromised greed, which could cause one to take more than their fair share. The contexts and causes of such emotions contribute to how they will eventually play out.
When it represents a pragmatic want for material goods or skills, this card represents a healthy drive even while it may come with some unpleasant feelings. While the stress of making ends meet or finishing a project is difficult, done correctly it build a better foundation for the future.
This card may also mean that one is identifying excessively with the material, their wealth, possessions, or lack thereof, or their physical presentation. In other words, it may signify a materialistic mindset.