Despite the recent price decline of Bitcoin, the prices of huge altcoin names such as ETH and BNB have gone up.
I don't know where you took your data from but I know for sure that those two altcoins you mentioned correspond with Bitcoin price movements. They bleed whenever Bitcoin bleeds and rise when Bitcoin soars.
Over the history, Bitcoin has been and still is the most reliable cryptocurrency...
That's true, at least at the moment Bitcoin remains the most reliable.
the others don't seem to overtake Bitcoin's dominance in the foreseeable future.
If you say none to top Bitcoin's dominance of the total market share at the moment, you're right. However, we may see a turn of such dominance in the "foreseeable" future you mentioned. Things are changing and Bitcoin's dominance is gradually dropping. Before it used to have over 70% dominance. Today, it's around 40%.