I will say it was just a glitch. Not only seeing a certain day take a look at the whole week the statistics is rising always thaat small down site is not noticeable. If we see the marketcap of first trending 30 coins every coin is going up after the glitch of 30 august.
what glitch?!!!
have you actually checked the prices? if not go do it now. there was a small price drop in bitcoin (about 1%) and then that started a bigger dump in altcoins which went as big as 10% for some of them.
and it is now just bitcoin which is going up and most altcoins have had another 1-2% drops today.
It only means that altcoin investors are are stimulating bitcoin market now that's why altcoins are dropping slowly. Bitcoin is now about $7300 threshold and in the coming days we might see it crossed $7500 if new money started to pour in or investors are reluctant and skepticism started to disappear.
Its only worth mentioning that the OP has started this thread several days ago, so a lot has happen and just when we don't that this can be another bull trap, bitcoin market is slowly turning into green zone or bullish trend.