I would say drive it as much as you can! But as for a Daily driver......it all depends on what your thinking of a daily driver is...
I have taken my 67 to work on nice summer days. But would not think of taking it out on a day they are calling for rain! Also it depends on what your parking is like at work. I park on an end spot with a tree on one side and my boss parked next to me on the other side. (Her husband has a 68 camaro, so i know when she parks next to me there will be no doors open into mine.)
Some times ill even pull it in my warehouse bay so at lunch i can wax it up!
(gota love those long lunches on a nice sunny friday!)
Insurance would be a big issue too.... most classic car insurance companys state it can not be used as a daily driver. So if something were to happen, it would not be covered. Then the cost of repairs will hurt the wallet! And if you were to go with a regular insurance company you would get the full coverage amount for what the car is really worth.
But if I had unlimitted cash flow I bet I would have two cars... One to drive daily and one for shows- and maybe a third just to drive while the other two are getting detailed.