Reason According to me:

1. Ranking of Steemit is Growing Rapidly.

2. It is One Of the Best Social Marketing Influence r.

3.Now a Days Steemit Awards 1.3 M SBD According to Google.

4. Steem Bots really Help Them to Purify All the Contains and Filter them.

5.Social Media Money

Yes in future one of the best Way to Get Crypto Via Social Media Platform.

So it will be the Future of Cryptocurrency, that will Crash BTC and other Coin.
Images form www.google.com
Thanks You @hot.topics.