By the way, Coinbase is adding new erc20 tokens frequently, is there a chance they might add ETHBULL so i have control over my 'trapped' tokens?
I doubt it, knowing that I haven't even heard of that erc20 token. Also, regardless if they add that token tomorrow, I don't think it will automatically give you access to your tokens. I don't think Coinbase's platform works in a way that you can send all your ETH and ERC20 tokens in only 1 address, like how you can do using non-custodial wallets like MEW.