Crypto-related stocks rose in US premarket trading on Friday as bitcoin climbed more than 8 percent percent to around 77,820 dollars, its highest level since the end of May.Strategy rose 9.2 percent, Coinbase 6.2 percent and Circle Internet Group 6.9 percent. On the Swedish stock market, Safello rose 5.5 percent and K33 6 percent, among others.The rise was supported by increased risk appetite and President Donald Trump's call for Congress to move forward with the Clarity Act, which is intended to create a clearer regulatory framework for the crypto industry. The US Treasury Department's announcement of doubled buybacks of government bonds also contributed to sentiment.