Howdy (first post),
It would seem purchasing BTC is better than mining it at this point, but it's going to be for the long haul, you would probably do well to set a reasonable rate of return and once you hit that, sell just so you get an idea of fees, transaction time, (if it actually goes through, etc...).
I'm as new as new can be, so I've been mining a bit, then moving my meager Bitcoins around to see how long things take, which sites seem decent and which ones seem fee heavy (might be useful once you decide to cast out all your millions of BTC)
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Good luck, I hope those of us that are very late to the game can at least have a bit of fun and learn more about what is arguably one of the most interesting things to come down the pipe in quite awhile.