History is repeating itself because in the last month of August, BTC dominance crossed 50%, and at that time, the market was also going up, people were saying that this was the start of the bull run, but after that, the market was dumped by the manipulators and the whales. This shows that this might be another bubble to bring more investment into the market. And we also know that when the price of the market increases, many newbies who have listened a lot about halving and bull runs must think that the bull run might have started and they got into FOMO by thinking that they will not get another chance to take entry in the market.
Yeah, it was just all make believe by these whales. I am sure this is not just the first time it crossed over 50%, and this means nothing anymore. Before we are celebrating bitcoin dominance but because there are a lot of coins now in the market, all the money became diverse, and nothing's really surprising about it, not even a cents. Try not to look at it and you will be surprised how it moves parallel to the market situation. Bull or bullish it doesn't matter, it is and it will be always the hype, news, and just whatever and whenever they want to buy BTC.
And they must have made a mistake by taking lump sum entries, which is a big mistake. Because dominance is not an indicator to take entries in the market instead it increases when there is more money in BTC and less in fiat. Alts have some relation to the dominance of the BTC as @Faisal2202 shared a useful pic.
I agree, don't make it as an indicator, again it means nothing anymore. I suggest to look out for more altcoins if you want to buy, but pay respect to BTC and get more than 30% of your portfolio of it.