It indicates the means to protect your interests will be limited.
Dream dictionary: Conspiring dream meanings
Dreaming about walking inside a dark tunnel means youre acting blindly, which will bring bad results in everything you are doing. To be inside a tunnel while a train is speeding inside it, announces disease or an important change in life. To build a tunnel means enemies, competitors or rivals are conspiring to harm you. Looking inside a tunnel without entering it, means that you will receive proposals for doubtful legality issues. Symbolically, the tunnel is a channel of communication, dark and gloomy, between two areas of clear light. That is the reason why the tunnel is usually associated with initiation rites and birth. The tunnel exit represents the maternal vagina.
When it is about money, we must be careful because we are threatened by a possible loss. If it is about objects, someone is conspiring against us.