Cryptocurrencies have different use cases and fundamentals, but the macroeconomic conditions are an important underlying driver. The Federal Reserve's policy has an enormous influence on macroeconomic conditions through liquidity, borrowing costs and risk appetite, making it a key factor for the crypto market. Because cryptocurrencies are risk assets, they tend to struggle when monetary policy tightens and benefit when policy becomes more accommodative.By raising interest rates, the Fed increases borrowing costs for households and businesses, restraining consumption and investment. This can slow economic growth and tighten financial conditions. Conversely, rate cuts reduce borrowing costs and can support economic activity by encouraging spending and investment. When growth is resilient and financial conditions are supportive, investors are generally more willing to allocate capital to riskier assets, including cryptocurrencies. During tightening cycles, higher borrowing costs and reduced risk appetite can trigger capital outflows from speculative assets, contributing to corrections or bear markets. During easing cycles, improving liquidity and a greater appetite for risk can support crypto rallies.This helps explain why Bitcoin, Ethereum and many altcoins often move in the same direction during major market swings, even when their underlying fundamentals differ.Keep in mind that policy tightening can coincide with strong growth, while rate cuts driven by recession fears can still weigh on crypto prices. So, the economic context is also an important factor to consider.One of the most important things to know is that markets respond to expectations about the Fed's future policy path. If markets anticipate rate cuts, cryptocurrencies can rally before the Fed acts. Conversely, if investors reprice expectations toward higher rates in the future, the crypto market can drop even if the Fed leaves rates unchanged in the near-term. The key is how expectations evolve relative to what markets have already priced in.Bitcoin, Ethereum and altcoins have different fundamentals, but they are all exposed to changes in global liquidity and risk appetite. Smaller cryptocurrencies are particularly vulnerable to tightening financial conditions because they tend to carry greater volatility and liquidity risk. Crypto-specific developments do matter, but the Fed determines the broader macroeconomic environment in which these assets trade. So, crypto-specific developments rarely change the main the trend, but they do affect the magnitude of price moves.In conclusion, crypto traders should focus mainly on the Federal Reserve and the factors influencing future interest rate expectations rather than monitoring all the crypto-specific fundamentals. This article was written by Giuseppe Dellamotta at investinglive.com.