By "move your bitcoin" I guess you mean "sending the bitcoin to another wallet" ?
People have lost their Bitcoins in the past, when they installed a Forkcoin wallet that contained malware. Don't risk it, don't trust those wallets. Move your Bitcoin to safety first, then use a VM or other computer to install the Forkcoin wallet.
At current prices, for a 50 Bitcoin Casascius coin, you're looking at (give or take):
$2150000 BTC
$11700 BCH
$3500 BSV
$1500 eCash
$1000 BTG
$40 BCD
Some of those are only traded on exchanges I wouldn't easily trust. Don't send more at once than you're willing to lose.
I can offer my services to recover those 5 Forkcoins, feel free to make me an offer.Here's my take on offline signing:
Online:Install Electrum on your PC.
Import your address to create a watch-only wallet.
Preview the transaction, Copy the unsigned transaction. Put it on a USB stick.
Offline and running without hard drive storage:Get a Linux LIVE DVD. Use Knoppix or
Tails for instance, or any other distribution that comes with Electrum pre-installed.
Unplug your internet cable. Close the curtains. Reboot your computer and start up from that DVD. Don't enter any wireless connection password. Keep it offline.
Start Electrum. Import your private key.
Copy your unsigned transaction from the USB stick, load it into Electrum.
CHECK the transaction in Electrum. Check the fees, check the amount, check all destination addresses (
character by character).
If all is okay, sign the transaction. Copy it back to your USB stick.
Turn off the computer. That wipes the Live LINUX from memory and all traces are gone.
Online:Use your normal online Electrum to (check again and) broadcast the transaction.