Pro Picks: Watch all of Monday's big stock calls on CNBC

Jim Cramer, Joe Terranova of Virtus Investment Partners, Karen Firestone of Aureus Asset Management, Gene Munster of Loup Ventures, Brent Thill of Jefferies, Steve Weiss of Short Hills Capital and Victoria Greene of G Squared Private Wealth on why they are buying, selling, or holding specific stocks and ETFs.