When I googled "Master Riggers", it sounds to me that this term is referring to a job or position in the construction sector, rather than a business. I feel when registering or buying expired domains, we should ask ourselves, what kind of product or service can this domain sell, should it be eventually acquired by an end user? In my opinion, it is possible that "MasterRiggers.com" may become a union website for Master Riggers.
However, if given a choice, I would rather choose other domains than registering this one.