(Bloomberg) -- Crypto asset manager Grayscale Investments is in talks with firms, including JPMorgan and Goldman Sachs, to potentially play a key role in its proposed Bitcoin exchange-traded fund, according to a person familiar with the matter. Most Read from BloombergTech Stocks Log Four-Day Losing Streak, Bonds Rise: Markets WrapHarvard’s President Quits After Plagiarism, Antisemitism FurorSaving the Panama Canal Will Take Years and Cost Billions, If It’s Even PossibleIran Blasts That Killed N