Assuming the price of bitcoin will remain the same... - if, in a years time from now 1 BTC = $500 dollars then these little usb gizmos will have been a steel...
Think of it this way: if your goal were to profit based on the assumption that the value of BTC will rise, then your best move is to buy one of these at 2.2 BTC (around $245 USD currently) and then sell it on Ebay for around $400 USD. Take that $400 USD and buy BTC. Repeat.