Definitely I would rent a car with bitcoin, considering the platfrom is a reputable one with good customer support for its users as well a physical company where one can easily connect with the team in a certain country. Barriers like this is what bitcoin was created to solve so people would be able to control their cash at any point in time. Although I haven't tried out renting a car before but if eventually I end up needing one for a quick purpose, definitely I would check out for platform like this.