Ask HN: Obtain a domain from a squatter by trademarking

I have hit upon a great domain which is being squatted upon at the moment. Everything except the '.com' domain is available. Thank goodness, I don't need the '.com' now (I am based in Canada, so will use '.ca' for now) but I will need it in the future. I don't want to grow my business and then get extorted. How about trademarking in the mean time, and then forcing the squatter out of the domain. Is this a good strategy?