Crypto is a bit complex for a lay person to easily understand. You can make it difficult depending on how you approach the concepts. The best way is by assessing the prior knowledge of the individuals that you are dealing with. After you have explored their knowledge, the next thing to do is to explain the basis of blockchain technology and why it was introduced, after which you can explain how and why bitcoin or any other crypto was created.
You don't have to be a rocket scientist to understand how the blockchain and cryptocurrencies work. You also don't need to understand the inner workings of cryptocurrencies to use them. My grandma has no clue about how the internet works, but she is a pro at sending emails and using facebook. The same applies to cryptocurrencies as well.