I have 80% chance of growing the conservative portion of my investment 18% every year. Now this credit card company approved me a $100,000 credit line at 10%. Should I take money out of this line and invest in the market? How can I avoid the cash advance charge (2 to 5%?)? Noweven if I decide to use this credit line, I need to establish another line to roll on, any suggestion on a better line?