Investing.com - The day may come when you can trade cryptocurrencies on the Nasdaq exchange, but not until proper regulation is in place.That's the position of CEO Adena Friedman in an interview with CNBC.Friedman says the Nasdaq "would consider becoming a crypto exchange over time," assuming "people are ready for a more regulated market."She is a believer in cryptocurrencies and says "it's just a matter of how long it will take for that space to mature."Friedman underscored the importance of regulation in "providing a fair experience for investors," and singled out initial coin offerings, ICOs, as an area where oversight is needed.U.S. regulators are in the midst of a crackdown on ICOs because of the potential for fraud in attracting investors.