My host invited me out for a beer and barbecue with him. The host couple drove with an American and I to the barbecue place. It was on a grass field near the sea. A band was performing in the stage in front of us. 

The American recommended that I should do something related to blockchain. He invested on blockchain-related ventures and sold his shares to earn money. 

I was cautious about blockchain because lots of people lost their money on it. But I liked this guy. He was gentle and friendly and cared for quiet places. I thought we could be good friends. Maybe I can learn more about blockchain from him. 

Taking with my host about local cultures, I heard more unknown words and felt I need to learn more English words to communicate better.