Re: Is it okay for Bitcoin Core development to be funded by Banks?
Where is the Bitcoin that Satoshi created 
Who is fighting for the Decentralized, purely peer-to-peer form of electronic cash that gives people back their financial freedom and sovereignty ??
Over years since 2009, many versions of Bitcoin Core has been built and deployed so what's your reasons to use very old Bitcoin Core version?Who is fighting for the Decentralized, purely peer-to-peer form of electronic cash that gives people back their financial freedom and sovereignty ??
Have to know there are changes in the protocol with upgrades, hard fork and by using newest Bitcoin Core version, you will be better compatibility with other Bitcoin users or on many platforms.
Now, let's see the magic from Bitcoin.
If you have a private key, you can import it to a wallet that can be either Bitcoin Core or any wallet software compatibles with the BIP, and get access to your coins.