We could go up to somewhere above $1000, but I don't see this as a high potential upside right now. Bitcoin is a risky investment, and at this point in time I don't see the rewards being consummate with the risk. There's a real risk we're on the verge of mass hysteria and subsequent bag-holding. Another bubble could be a long time in the coming if so.

Fine to hold, but eventually holders will become impatient and want to increase their stash. They do this by dumping.

Might make sense to buy a little all the way down, but it's less risky to wait for the bottom to be in and buy on the next upswing -- it will probably be cheaper.

Christmas isn't traditionally a strong buying season, so the bottom may come early next year sometime.

Of course, I could be totally wrong. But to me this is as much about managing risk as going balls-in.