I don't know if your story is true, but this is the first time I've heard of someone teaching someone about Bitcoin so quickly and convincing them to accept Bitcoin. Didn't you have fiat currency? And you should have bought products from stores that accept payment through Bitcoin. Anyway, it will be risky for the merchant because Bitcoin is not stable, so will he be able to convert Bitcoin to a stable currency at the right time? Did you give him an idea about this? If not, then the merchant may suffer losses.
This story is fabricated and I'm not sure if it's true. If OP is close to the person perhaps they have been a close friend and has been buying things there before, I will say it's easy to convince friends to try something they have not use before. You can't out of no where tell somebody to accept something they don't plan to have, even if the person knows about Bitcoin before, he will still want to have his money because that's his business money we are talking about.
If this is a centralized exchange deposit and it involves Bitcoin, I will be convince that what he said is true since the transaction will be an internal one, there will not be charges for fees, there will be no waste of time in transaction. From there, he can use a p2p. From his description, none of them looks familiar to be realistic.