It keeps going up because big money is buying in. $20 short-term is not a silly figure if you do a bit of research into their technology, projects, partnerships, and subsidiaries.
Like tlo said, lots of folks here have been accumulating shares for quite some time because they know the potential.
Current $500M market cap is low in comparison to what Medium is bringing to the table.
I'm not going to tell you to buy or not. Number one rule in runners is to not chase. Now will we get a pullback? Hard to say. The last consolidation day it held pretty well. The interesting thing is, it hasn't even really had a high volume day yet. It is bound to have a multi million volume day at some point and when it does, it could really go. It'll be interesting to watch.
Why isn't there any real chatter about it you ask? Because it's all smoke and mirrors like every other pump play has been in the history of the OTC since the very beginning. Play it if you dare, make money, get out safe and don't look back. Things never pan out the way the hope crowd expects, but you can still make mega bank