There are several factors that lead to the decline of cryptocurrencies, including:

- Lack of tangible assets: Cryptocurrencies do not have tangible assets that support their value, increasing investment risks and making them susceptible to significant price fluctuations.

- Inflation and interest rate concerns: Rising U.S. inflation and changes in interest rates can affect the cryptocurrency market and make investors more cautious.

- Government policies: Some governments take strict actions against cryptocurrencies, such as banning trading or mining, which affects demand for them.

- Environmental concerns: The high energy consumption for mining cryptocurrencies raises environmental concerns, which may lead to a decrease in demand.

- Regulatory uncertainty: The ongoing development of laws and regulations related to cryptocurrencies can create a state of uncertainty in the market.

- High volatility: Cryptocurrencies are known for their high volatility, which can lead to significant losses for investors.

- Impact of rumors and collapses: Rumors about company collapses or financial misconduct can affect investor confidence and lead them to avoid investing in cryptocurrencies.

- Cyberattacks and fraud: Cryptocurrencies are susceptible to cyberattacks and fraud, which can lead to a loss of trust in them.