^^^This. If you're doing time-machine scams like this you don't want to bring the item back WITH you, as then it won't be properly aged(remember time is relative, and it's measured through atomic decay. Even conventional means of verification, like look/feel/smell of item, relate directly to this; buying near-to-print and bringing it to another time will just make it look like a very authentic, but poorly conceived, fake). You've got to stick it in a good container, stow it somewhere both safe and where no-one else can get at it(and which won't be raided by vultures, like a storage-locker), and then recover it at the time you mean to cash it out. Of course, as so many have said before, at that point you might as well just open a bank-account then, to cash in on it's appreciation now(buying gov bonds, stowing in a safe-deposit box, and skipping ahead to cash them at peak-return value, rinse-repeat, is another good low-risk strat with much higher gains than just letting the money sit there. Playing the market, like sports-betting, is a BAD IDEA: that's how they getcha!).