Hi Cricktor,

To clarify what I did :
-I have downloaded Electrum 4.2.1 using macOS Monterey Version 12.3.1
-I have created a new standard wallet

However, if I understand well what I have to do is :
-Choose the option "Create New Wallet"
-When the dialog box asks "What kind of wallet do you want to create ? " --> I have to choose "Import bitcoin addresses or Private keys"
-Enter the private key of the "Cascasius" coin in the dialog box and click on "Next"
-After that, my Electrum wallet (the new one then) should show exactly 1.BTC as balance and I will have the possibility to send the amount on the exchange platform of my choice

Is that correct ?

For the moment, I haven't submitted the private key (I haven't unpeeled the coin yet) because I want to be sure of the process first.
Another reason is that I'm hesitating between peeled the coin and convert in bitcoin or selling the coin in the "Collectibles" part of the forum.
What do you think about it ? What's the best solution ? I have searched a little bit on the forum but the opinions are divided.

And finally, what's your advice for the exchange platform ? Binance, Kraken or somewhere else ?

Thanks