There is no doubt that paper wallets are one of the most secured wallet (if you created and secured it correctly) and will fit for those people who have a tight budget, but it is not user friendly because some people who doesn't have enough understanding on how it works and how to spend Bitcoins on a paper wallet by importing the private key to a wallet that supports it, I think they will have a hard time. It also have a disadvantage because of its physical form, if you are a type of person that is disorganized and careless, paper wallet is not for you. Personally I would rather buy a hardware wallet (even it is more expensive) than paper wallets if I am going to hodl a coin for long term.