But that does not explain it...if you just say it's digital money. What is digital money? Who created it, how can it be worth something. I think your explanation is simple but yet too simple to be real explanation.
I think it is better to give just enough (short and concise) information and answer questions that arise, instead of giving mindblowing full information from the beginning. Human brain performs better when faced with simple tasks in sequence, not a full complex task.
However, it depends on your audience. If your audience is a scholar then maybe you can give a detailed explanation from the start.