How to avoid ban on second channel

I have an established channel that I care for and develop for years. Lately I wanted to start a new, separate channel with quite controversial niche. I’m prepared that this new channel can get banned if the format is too controversial. The question is - how to secure my old channel?

I must use a different email address for sure. Should I link it with a different phone number? And what about Adsense account - is it safe to plug 2 channels into one Adsense? What if one of those channels get terminated? Will it get traced to the second channel of mine? Need your advice, thanks!