It would have been another banner day for Silicon Valley’s blossoming alliance with Washington — if only President Donald Trump and Elon Musk hadn’t been attacking each other online.

While the two men traded barbs on their respective social networks, a cryptocurrency company whose business had been hamstrung by the Biden administration went public on the New York Stock Exchange, its share price popping 200 percent. An artificial intelligence company heralded a new product designed to help the national security establishment. And the defense tech start-up Anduril raised $2.5 billion to expand its efforts to get Pentagon contracts.