Which attribute would use want a ring of special power to have?

Let say you visited a carnival, and there and old man tried to sell you a ring. He said he could adorn the ring with certain attributes or powers that when you invoke them they will serve you for 45 minutes and then the ring will go dormant for the next 6 hours until you could use it again. He also told you there could be side affects to using the ring. If you purchased it which power or attribute would you want the ring to have if given the choice of being invisible (just you not your clothes or anything you carry), super strength (you could toss a fully loaded cement truck 60 miles with the ease of flinging a cotton ball), super speed (you can walk up to some one draw a Sharpie mustache on someone and leave ant it would appear to them to come from nowhere), the ability to read peoples’ minds to know what they are thinking right when they are thinking it, the ability to manipulate people to plant a thought in their head to do or not do something and they will think it was their choice to make, and why did you chose the attribute you did?