It depends on a lot of things. Even now, cryptocurrencies are a niche product. It's too complex for the mainstream consumer.

Steemit is a game changer though. It's the first time a crypto app makes sense - you earn money for your posts. It's still going to take time though, although it could explode depending on how its marketed. It could go viral any day.

But I think it's going to grow fast and flatten out at a few million, reaching out to the tech savvy people. Then explode again when it goes to the mainstream. When? Could be a few years. Could be next year.