What moves the cryptocurrency market?

Bitcoin moves the cryptocurrency market 
Its dependency on the US dollar increased 
Bitcoin holders better believe that the US dollar is in a bearish market
Investing in the cryptocurrency market is not for everyone. Volatility, for example, is much higher than in other markets. 
Sometimes, for no apparent reason, the prices of various cryptocurrencies bounce or decline aggressively, leading to speculation that the market is rigged. Lack of regulation might explain the moves, but