(Bloomberg) -- A powerful rally in US stocks as well as cryptocurrencies has left the asset classes looking frothy, according to Bank of America Corp.’s Michael Hartnett.Most Read from BloombergKansas City Looks Back on its Long, Costly Ride With MicrotransitNYC’s Run-Down Bus Terminal Gets Approval for $10 Billion RevampAs Wars Rage, Cities Face a Dark New Era of Urban DestructionThe S&P 500’s price-to-book ratio has surged to 5.3 times in 2024, approaching a peak of 5.5 hit in March 2000 durin