U.S. stock market opens, Dow falls 4 points, S&P 500 rises 0.12%, Nasdaq rises 0.36%. Blockchain concept stocks generally rise, Strategy (MSTR.O) up 2.6%, AMD (AMD.O) up 1.6%. Some star tech stocks rise, Tesla (TSLA.O) up 0.4%, ASML (ASML.O) up 3.1%. Nasdaq Golden Dragon China Index rises 0.19%.