Don't worry about the end of the bull market.

The current trend needs at least a BTC drop for more than half a month or a continuous decline for over a month to possibly end the bull market. This is just a prerequisite; if it ultimately doesn't break the trend point, the bull market continues.

Currently, we are far from that point; we are still very early.

Of course, is there a possibility that this is the beginning of a one-month drop?

The probability is low, but if you really think so, there's nothing much to say; indeed, there are no completely refutable reasons.