With a CRISPR kit you can add luciferase to house plants so they glow in the dark.
169.00 dollars; and once you learn the basics you can get free code samples and create your own lifeform, or if you're a psycho, modify a common virus and unleash it on the world.
https://www.the-odin.com/diy-crispr-kit/
Don't know how to modify a virus? Can you follow a recipe? The recipe, the actual code for the '17 flu virus is online. Right here.
https://www.bunniestudios.com/blog/?p=353
There are a whole lot of things that become existential threats once they are connected to the internet. That's because the internet turns an ordinary threat into a nonlinear one.
For example, there might only be a a few hundred individuals in 3 or 4 secret societies sufficiently malignant to want to destroy humanity - the internet connects them with each other, and with the resources and information to plan and very feasibly execute a world ending catastrophe.
Anonymous, insecure networking connects the most sophisticated and ruthless criminals in the world to everybody else. Worse, every time a new technology like CRISPR is invented and placed online, the possible unforeseen interaction of this powerful new technology with existing technologies presents a cubic (3) existential risk.
That risk is cubic.
New tech introduced
1 initial unforeseen threat emerges when placed online
X
2 " " emerges on interaction with existing online tech
X
3 " " emerges on introduction of new tech
cubic expansion of the probabilities will produce a disaster if left unmanaged.
For this reason and several thousand others we must fix the internet.
"new tech" includes software, virtual objects and machines, ideas, new computational methods etc as well as traditional manufactures.