Icahn could not immediately be reached for comment.
Andreessen, who has been an investor in bitcoin, said that he was in the virtual currency for the long run.
"We're not really focused on the price. We're focused on the technology that's getting built and the infrastructure that's getting built. I mean, bitcoin is a global payment network. It's bigger than it's ever been," he said.
Bitcoin prices plummeted over the weekend, hitting a new 2014 low of $304, before recovering some of its value.
Read MoreMarc Andreessen in bitcoin for the long run
But Andreessen said he wasn't concerned.
"This is like judging the Internet in 1994 based on the price of domain names," he said. "It's still very early. The world has not yet adopted bitcoin. It's still extremely early."
The technology behind bitcoin was the important factor, Andreessen added.
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"The core technology phenomenon, which is what we're interested in, is doing extremely well," he said. "I think the price is going to bounce around. I mean, prices of lots of assets bounce around. Prices of banks bounce around, and yet banks are still standing."