You have a few options (as others have already indicated):
- Pass on it and find something else - No Risk
- Register it and offer it for free to the one you saw - Low Risk
- Register it and develop a business model in a completely different industry as one you saw - low Risk
- Register it, put it up on a sales lander with a price tag and wait (No outbound) - Medium Risk
- Register it, land it, price it, monetize it and outbound it (to a vertical niche) - Medium to High Risk
- Register it, land it, price it, monetize it and outbound it specifically to the one you saw - Highest risk
Note: Risk assessment is gauging the likely hood of a potential legal action against you that could result in the domain being reclaimed by the registrar or registry, losing a UDRP being filed and/or financial loss.
The risk levels are actually on a sliding scale, that can go up or down depending on what you do with the domain name once in your possession.
For example: Even things out of your control can raise the risk level, such as, but not limited to listing your domain on a 3rd party sales lander that you can't fully customize and automatically shows ads on the landing page relevant to the domain (Many, not all, parking companies and marketplaces with landers serve ads on the page). Unfortunately, if an ad is displayed that results in any actions (Click, buy, subscribe, etc.), it could be considered an attempt to profit off an existing trademark confusingly similar to your domain.
In a case like that, a
medium risk domain could easily slide into the
highest risk category.
What ever you decide to do, good luck!
