The decentralization of bitcoin is what has made it survive to date. If bitcoin becomes centralized, it will be manipulated like other fiat currencies, and investors will withdraw their bitcoins because many of them have huge amounts of money that have been invested in bitcoin, which, if it can be controlled by the government, seriously puts them at high risk of losing those funds. Or maybe the bull run we are expecting will not come as we want until the government says something about the price, and you know some alternative coins depend on bitcoin price to fall or rise.

Once bitcoin becomes centralized, alternative coins may crash, and even if they survive, people will only use them for investment because of the profit they may generate during the bull run. But they will not last like bitcoin because, as you know, many of these alt coins are centralized, and anything can happen. The coin may crash, and the investors may lose the funds that have been invested.

If bitcoin gets centralized or even if bitcoin dies the other coins will survive because they run in their own blockchains, In the end, bitcoin is independent from other blockchains, if it works or not it doesn't affect the other coins.

The only thing we would see would be a change in the markets, maybe ETH takes the place of number one in the market and the other coins' price becomes now on ETH price based. That would be my prediction.

If Bitcoin becomes centralized?  In the first place investors will not trust and doubt is always of those who adopted Bitcoin.
It could potentially be causing a loss of confidence among investors and users of this technology and could lead to a domino effect, affecting other cryptocurrencies that also rely on the principles of decentralization and trust IMO.

So there's nothing more exciting when Bitcoin becomes centralized and backed by the government and it could be vulnerable to attacks, manipulation, or external pressures, potentially impacting national security and financial stability.
So that is why it was created as a decentralized we know the purpose.

the answer is another cryptocurrency will survive like now because the some of altcoins had different purposes and for now I considered Bitcoin as digital gold or to use as a store value. While altcoin can use as other thing like saving medical record or authentication as an art. and it will be there

Supposes bitcoin is centralized I do believe other cryptocurrencies will survive. But currently, even though Bitcoin held firmly its principle, any other coin are not having any decentralization that is close to Bitcoin. In fact, some of them only use the word decentralized as a buzzword. So the reality is that other cryptocurrencies did not maintain that aspect as a priority. Given that, if Bitcoin somehow loses its credibility, I don't think there will be something wrong with the sustainability of other cryptocurrency projects.

Fortunately, bitcoin is decentralized and no one can change that. But in the case of bitcoin being centralized, I don't think there will be another coin that can be decentralized because apart from bitcoin being created to be currency decentralized, all altcoins are designed to become an investment. How can someone create a decentralized coin when their goal is profit? Only bitcoin is decentralized because Satoshi didn't intend to make it an investment but because we made bitcoin an investment.

But whether bitcoin is centralized or decentralized, altcoins will still be created and will survive because that is the financial playground that market makers create to make a profit, they will not give up easily it.

Centralizing Bitcoin would be an obscenity in its perfect design.

In terms of influence: Bitcoin's massive market dominance can affect altcoins, but its more than statistics. Trust, honesty, and decentralization transform. You think altcoins can endure due of their uniqueness? Without Bitcoin's decentralization's confidence, these special qualities are worthless.

Every altcoin today was inspired by Bitcoin. How can crypto derivatives not suffer if the gold standard is compromised?

Your final point on universal acceptability Giving value is superficial. Bitcoin has constantly supplied ideals, trust, and utility, which create value. Should it centralize? The crypto world would be in chaos and distrust.

If bitcoin become centralized then I think people will follow its success and no matter it is centralized or decentralized because people always select that way which gives them earning ability.

Other coins already deepens on bitcoin so when bitcoin become centralized then it will depends on the demand for bitcoin, if more people demands for bitcoin then surely there will also be good impact on other currencies otherwise other coins will loss their value like that of bitcoin.

If Bitcoin were not decentralized, it wouldn't have earned the interest and trust of the people and institutions. Which means that it wouldn't have even taken off. The price of Bitcoin would have remained very low, if at all. This further means that cryptocurrency wouldn't have become a huge thing like today. There'd be no crypto market. Neither would there be a crypto industry. Every altcoin wouldn't have existed, knowing that they are all riding on the success of Bitcoin. That success is owed to its decentralization.