I still fall in the trap of thinking the bitcoin I have is somehow “in my wallet” I know it’s not it actually. It’s on every node that has a copy of the blockchain running and that description is probably not completely accurate either.
Discussion
That's pretty accurate. The only way for your Bitcoin to be gone would be if every node were to be destroyed. Very resilient.
By contrast, your ability to access your Bitcoin can be lost if 1. you lose the ability to communicate with any Bitcoin nodes, or 2. you lose your private key, or someone else obtains your private key. Significantly less resilient, and dependent on how you manage 1 and 2.