It is not easy to make a significant side income as a cryptozoologist, as this field is not considered a mainstream scientific discipline and is not widely recognized or respected by the mainstream scientific community. Many people who are interested in cryptozoology are amateur researchers or enthusiasts who pursue their interests as a hobby rather than a source of income.

However, there are a few ways that a person with an interest in cryptozoology might be able to generate some side income:

1. Writing and publishing articles or books about cryptozoology: If you have expertise in this area and are able to write engaging and informative content, you might be able to generate income from writing and publishing articles or books about cryptozoology.
2. Giving talks or lectures about cryptozoology: If you have a lot of knowledge about this topic and are a good public speaker, you might be able to generate income by giving talks or lectures on the subject.
3. Participating in research projects or expeditions: If you are able to find research projects or expeditions that are focused on studying cryptozoological phenomena, you might be able to generate income by participating in these projects as a researcher or field assistant.
4. Creating and selling cryptozoology-related merchandise: If you have an artistic talent or are able to design and produce merchandise, you might be able to generate income by creating and selling items such as t-shirts, mugs, or other items with a cryptozoology theme.

It is important to note that the potential for generating income in these ways will depend on your skills, expertise, and ability to find opportunities. As with any field, it can be challenging to make a significant side income in cryptozoology, and it may require a lot of hard work and dedication to achieve success.