There's a feeling that the greeting "oi" might become as popular as "gm." Before long, it could become the most common way to say hello in the crypto community, even evolving into a unique slang culture. This kind of vocabulary evolution is quite common in communities, gradually transforming from niche self-amusement terms into popular memes used by everyone, eventually becoming a cultural label for a certain circle. The probability of "oi" taking this path is indeed quite high.