Bitcoin and Ethereum have gained 2.1% and 3.5% respectively, as investors await the Federal Reserve's next interest rate decision Wednesday afternoon. Bitcoin is changing hands for $89,842, about level with where it was a week ago, according to data from crypto price aggregator CoinGecko. And Ethereum regained $3,000 for the first time since last week, trading for around $3,026 after having risen 2.1% in the past seven days. With just hours to go before the Fed's first interest rate decision of the year, ...