The second part is also correct, blockchain.info is just a company. If they ever go bancrupt, or just disappear, a lot of people using the blockchain.info wallet will potentially have problems accessing their wallets (unless they made proper backups). But this has no impact on your paper wallet. You could just import your private key into a synced bitcoin core wallet, or into an SPV wallet like electrum, and you can just use your unspent inputs to generate a transaction without ever needing the company blockchain.info

import your private key into a synced bitcoin core wallet or into an SPV wallet like electrum.

Some more misconceptions...

First:
It has been stated before: bitcoins aren't a physical thing... You cannot hold a bitcoin.
Bitcoins exist as a number of unspent inputs, records into a decentralised database that say that address x has x BTC worth of unspent inputs.
The person holding the private key for address x can also generate a valid record that can potentially be added to the same decentralised database, that transfers the unspent inputs of address x to address y. In that case, the person holding the private key for address y can use the new, unspent inputs.
If you want to know more, i suggest using google to find more info on how bitcoins work exactly. There are tons of sites dedicated to this topic.

Second:
blockchain.info => a company that owns a block explorer and an online wallet provider
the blockchain => the ledger (database) consisting of physical files stored on hundreds of computers... The database of each and every transaction ever made.
Your transactions are stored on The Blockchain, offcourse, the node(s) of blockchain.info also downloaded The blockchain, so they also store your transaction, but they're just a company running a couple of nodes, they do not own the blockchain itself.
I know, it's confusing that a company chose a name that is the same as the technology they're using, but that's just the way it is...

So database is Blockchain.

First of all please don't add unnecessary "size" to your comments it is annoying. Instead change the "zoom" level of your browser if you have trouble reading.

I'll try to explain:
What you need to know about bitcoin is that there is no such thing as "bitcoin" and you are not "storing coins" what you have is a private key which creates a public key, and record of all transactions that are stored on this public ledger called blockchain that peers hold on their computer when running a full node.

When you receive bitcoin, what happens is that some else is signing away the ownership of an output to your public key. And when you want to spend that output you sign away ownership of that output with your private key and give the ownership to another public key and all the records of these transactions between people are saved on the blockchain so your "database" is the blockchain.

What you do offline (generating a paper wallet) is that you are creating that private key to be able to receive those outputs and be able to spend them later.

For checking your paper wallet's balance, you go to that database (blockchain) and check your public key and see how many outputs were sent to your pubkey and add them up to see how much balance you've got. You do this usually by going to an online block explorer and typing in your bitcoin address (base58encrypted) starting with 1 or 3.

What if the device is broken? No matter how safe it is. Theres still a hole that can be penetrated. But its a good idea tho. Instead you store it to usb. Why not use more secure device which ledger. I heard about ledger nano. And they said its really good hardware wallet. I think its more secure than usb.

hmmm sorry but maybe you missunderstand what i said
i mean instead of make the paper beforehand and safe it in digital form then print it when you need, arent it better to only create the paper file and print it when you actually need it?? coz most public PC have internet conection to access BTC wallet

or is it too risky to access wallet on public??? (I never didi it, IDK is it risky or not)

this is my first time hearing paper wallet since my country dont approve BTC yet

but your idea for storing it on offline device maybe a bit meaningless, since you always need to print it when you need BTC
and a lot of PC in public place have internet conection, so if the PC have internet isnt it better to just go online and create the paper wallet on that time

so paper wallet in digital form is a bit meaningless  
hehe sorry if I offend you  

you can still burn. step on. smash with hammer.
you can hand it to a kid who can snap off the usb end from the plastic cover


lose out of your pocket. thief stealing it. connect it to a computer with a virus.
electric shock. lightning strike, car accident,

the list goes on.

..

separate note.. having a paper wallet has its own utility.. putting it on digital media or a PC is no longer paper wallet.. emphasis on the word paper