It's a sign that too many whales have taken their profits.
Whales should already take profits on October 7, it was the day when the price of SHIB increased very significantly. Now, the price of SHIB gradually decreased a bit. The whales may still try to grab people's money but they are not as aggressive as before. If there is no big news again about SHIB progress, we can predict that the bullish on SHIB is over already. Be careful of massive dump after significant increase...
It did decrease because of it.
As long as they can see that there's a way to profit, they'll sell at any prices that they can make. Even it's not the peak of it, they'll sell at that price because they only care for the quick profit.