Which is a disadvantage of swaps?

Could you elaborate on what constitutes a disadvantage of swaps in the cryptocurrency and finance industry? I'm particularly interested in understanding the potential risks and drawbacks that investors should be aware of when engaging in swap transactions. Are there any specific scenarios where swaps could lead to unforeseen losses or increased complexity in portfolio management? I'm looking for a concise yet informative explanation that highlights the negative aspects of swaps in the current market landscape.