It's too late to get into Bitcoin.  You're supposed to get into investments when they're venture or in the beginning stage.  Bitcoin is already bigger than Western Union or any money transmittor I know about.

You could had bought Amazon stock at $10 with $500 and probably make crazy money (since they've had stock splitting)

We get this question occasionally and I think it's crazy.  Any version of Armory ever created can restore your wallet and/or let you access your private keys to be exported. Regardless of the availability of github (which is very reliable, btw), you only need one person in the entire world who's got an old installer in the downloads folder.  And if Bitcoin is valuable enough, someone will make it available.  It's not like there's going to be billions of dollars behind Armory wallets and everyone in the world will spontaneously delete all copies of Armory code/installers that ever existed (and github deletes the repo). 

Look at DVDDecryptor, and SSHSecureShell 3.2.9.  Those are two pieces of software that I use that stopped being developed 10+ years ago, yet the last version created is still easily available on the internet.  I don't see how a program holding huge amounts of money would not survive.  In reality, github will keep it forever, anyway, along with anyone who ever cloned the repo.

If you don't lose the copy of armory you just need the wallet backup info:  chain code / root key or something like that.  If you're afraid of losing the armory program and all future access to it, you need the private key (base 58) for each of your addresses that you have coins in.

Backup the executable. Then you can export private keys.

The cold storage is good but don't forget to secure the rest of your computer slfmde.

If you send from address not in cold storage then yes, your cold storage address can receive coins anytime