What type of wallet should I put my bitcoin in to ensure I will get both currencies (Bitcoin and Bitcoin Gold)?
Should I leave my BTC on coinbase (which apparently is a horrible idea) and from what I have read, people who had BTC during the Bitcoin cash hardfork did not get their bitcoin cash. I want to ensure I get what I technically own.
You can check some exchanges that will support bitcoin gold after the fork so that you will have your free BTG that time, but the recommended and safest way is to store your bitcoin in a offline wallet or a wallet that issues your own private key so that after the fork you can check some application wallet that supports BTG and then use the same private key where you store your bitcoins and then claim your free BTG without doing nothing, just make sure that is the official wallet of BTG as some hackers will create fake application just to steal your bitcoins so be careful.