Generally, sinking in a dream indicates unstable life without a starting point or an endpoint, possibly due to a lack of connection between the dreamer and the environment, leading to feelings of loneliness.
Dreaming of yourself sinking typically suggests worry and fear. You may feel like you lack the capability to maintain happiness and are losing control. Watching an object sinking gradually could indicate that you fear losing something precious or someone dear to you.
Dreaming of someone else sinking implies that you realize some problems may require external help to resolve.
THE END
