What are the disadvantages of buying Amazon vouchers worth 1000 euro (over several months)?

Then to buy a notebook or cell phone with it.

Amazon was used as a kind of money box because you can't open the box compared to real cans

Well, if the right device is available cheaper elsewhere, for example, that's a disadvantage

@ baum22221111 is right, they can also expire, although that is not the problem, as it takes 10 years. But besides these two things, I'm not aware of any disadvantages.

10 years if you haven't redeemed it yet; as far as I know

Yes, so you could still save them… It is really just the better price elsewhere that is a disadvantage. With a lot of luck, the shop will accept Amazon Pay, but the chances are pretty slim.

Why not a savings account? Or wouldn't that solve your problem either?

Don't feel like bureaucracy