No, actually the gap is how much steem is not liquid. This steem is stored in the form of Steem Power, which is a good sign of investment commitment.
The remaining is the amount of STEEM that can be transferred at any time without restriction. It is healthy to have a decent amount of Liquid STEEM. If the amount of liquid steem gets low, then it can become very valuable.
I talking about that gap:
Sorry about the confusion, I mean the dropped from the liquid Steem. That quantity needs to be a power up, or could be anything else?
That chart has two scales. The blue line is on the scale to the left. The orange line is on a scale to the right. The scales are adjusted so that you can see what is happening with both. This way you can see if they are trending up, down, the same, or different. The sudden drop is when someone takes a bunch of STEEM and stores it as SP. This converts Liquid STEEM to non-liquid STEEM. When you put both on the same scale, you have my second chart.