Great one there, but I hope you didn't force any of those viewers and learners to invest in Bitcoin.
Tell and teach them not to focus on the volatility of the fluctuating price of Bitcoin but to gradually buy little Bitcoins.
According to the scope of his lecture. He focus on the definition and use case of Bitcoin and not on the price. This is a good introduction when teaching a zero knowledge listener on the subject.
Im curious on the content of the materials that given to the attendees. I hope it really focus focus on the technology and utility rather than the price talks which usually the common intention of the participants.