Make money online: YES

Cold Therapy and Thermal Contrast Optimization can be a remote-friendly side hustle as the services can often be conducted virtually. While some in-person sessions may be beneficial for certain clients, they are not typically required. Reviews on forums like Reddit and Twitter suggest that this side hustle can live up to the hype, with many users reporting positive experiences and results. The success of this business may depend on your ability to access clients, time zones for scheduling sessions, and having the necessary equipment for conducting therapies. Overall, there do not seem to be any major red flags or surprises to be aware of when starting this side hustle.