Well, I don't see it wrong if you want to monetize bitcoin as an exchange for your services. I believe it exist for it to be used as an exchange as an alternative. As long as you follow guidelines provided by your country regarding fares, taxes, and other services I think there's nothing wrong with that.
I agree, Not everything is free even if it is searchable on the internet. The knowledge we learn about cryptocurrency that built up into our minds for a couple of years using it, might be free but the techniques and self-experience on crypto are precious.
Conducting a seminar/meeting pertaining to bitcoin may have some fee's on the host that might include the event area fee. I think it is worth investing in knowledge especially if you can use it in the future and can earn some money from it.