Bitcoin gains push up GBTC, Marathon Digital, Coinbase, Riot Blockchain stocks

Price volatility continues for the world's most popular cryptocurrency as bitcoin (BTC-USD) rises 5.2% to $46.4K, erasing its losses from mid-May, but still below its all-time high of almost $65K in mid-April. Grayscale Bitcoin Trust (OTC:GBTC), essentially a proxy for bitcoin, rises 5.3%. Bitcoin (BTC-USD) is up ~40% in the past month, while Grayscale Bitcoin Trust (OTC:GBTC) yielded slightly less, +37% M/M. MicroStrategy (NASDAQ:MSTR), which holds 105K Bitcoins on its balance sheet, gains 2.0%. Bitcoin miner Marathon Digital Holdings (NASDAQ:MARA) also correlates with bitcoin in terms of price action and volatility. Today, it posted a Q2 earnings beat on a higher hash rate and boosted bitcoin production. Combined with Marathon's positive Q2 results on Friday and bitcoin's move higher, shares climb 4.0%. Other bitcoin miners trend higher like Bit Digital (BTBT -0.7%), Riot Blockchain (RIOT +0.2%), and Bitfarms (BITF +5.4%). Coinbase (NASDAQ:COIN) rises 2.9% along with bitcoin's rally and BofA initiates coverage of the crypto exchange with a neutral