Fastest way to monetize - parking, website or simple Buy Now landing page

Hi guys. I’d like to monetize some of my domains; a way to justify the cost maintaining my portfolio.
1) Is parking worth it? These are hand regs.
2) Is there a better / faster way to monetize? And
3) is that even something I want to do? Or, am I better off keeping Atom, etc, Buy Now landing pages? Thanks in advance.

For 99,99% of domains it's better to have a sales lander without ads.