This is another card that was identified as great early on in spoiler season, and has inflated in price the longer that pre-orders were available. Initially it wasn't entirely clear just how good the Copter would be, though now most have identified it as one of the best cards, if not the best card in the set.
When I first wrote about Smuggler's Copter it was pre-ordering for about $2, and I correctly identified it as a good buy. As of now, the card is in the $8-9 range, which makes sense for such a great card from a set that is just being released. That said, the Masterpiece effect will certainly impact the price of rares going forward. A good reference point is the price history of Sylvan Advocate.
Sylvan Advocate has been a major player in Standard in multiple decks basically since it was printed, and despite this has never even been a $10 card. I think that Smuggler's Copter is a good enough card that we'll see peaks and valleys around other set releases, though as Kaladesh packs are opened over the next month I expect the price to fall.
Smuggler's Copter is absolutely poised to have a great Pro Tour performance, and there could potentially be a PT bump, though I wouldn't expect dramatic gains from the current price. I would be looking to sell Copters soon, and move off the card completely after the Pro Tour to possibly reinvest later. Again, this is a great card, it is just commanding a value that is going to be difficult to hold in a Masterpiece world.