It depends. Most crypto owners are NOT the anarch-capitalists who have an ideological belief Bitcoin etal.. will replace sovereign currencies. No, most owners are simply investors in China, Japan, and South Korea who want to get out of their own currencies, thus it functions as a monetary tool (versus currency).
And THOSE owners will not blink an eye if Wall Street or their own markets use the Blockchain to change market and financial systems.
RE: Who needs stocks? Former Wall Street trader uses Blockchain to create $200 million ICO