BTC will never be a stablecoin; it's impossible. One of the characteristics that sets it apart from any other market is that BTC will always be volatile. It moves a lot, with buying and selling everywhere. It's impossible; it would cease to be BTC and what it was created for.

BTC is a currency that was created for financial freedom, to escape the current system, which has many flaws.

It simply doesn't make sense for BTC to ever be stable. It might one day settle at $1 million, but that value is already significant, and even then, it will fluctuate when it reaches that price.

I agree that volatililty is one of the things that comes with bitcoin and nothing can change that about Bitcoin. But I don't think that the OP's question is whether or not BTC will eventually become a stablecoin.  I believe that the question is more like trying to know the mind of investors behind their reasons for holding Bitcoin, is it just for the profit or are there other reasons entirely.

Just assuming that the price of Bitcoin would be fixed forever, would people still appreciate the value of holding on to it for years or even to generations?  I don't know about you but for me, I feel that's an interesting question for discussion because it take our mind away from the idea of price appreciation and focuses on the significance of Bitcoin as a long term investment.

Then people would have lost interest in investing in bitcoin since there will be no difference between fiat and a stablecoin, they will be seeing it as fiat that does not worth saving.

The reason why alot of persons are storing Bitcoin is because of it's decentralized nature that has hedge control over inflation and store of value, so as Bitcoin digital currency without these values then nobody will be wanting to accumulate and hold Bitcoin since there will be no future reward for Bitcoin investors

The truth is that Bitcoin’s price is volatile and will remain volatile forever, and in fact, it will become more volatile in the future. This is because most of the total supply of Bitcoin has been mined. If long-term investors continue to hold Bitcoin, there will be a shortage of sellers in the market and will gradually increase the price. Bitcoin will never have this habitual of a Stablecoin in the future.

Bitcoin price may fall in the future and this is a natural dynamic of the price cycle, but it will not last long. I will continue to accumulate Bitcoin in the same way as I am accumulating Bitcoin now, through discretionary income, because in the future the price of Bitcoin will skyrocket.

Straight up , if Bitcoin turned stable , nobody would be buying it to Hodl anymore. We'd only think of it when we need it, like for international payments or the private payments you mentioned. Or some folks would use it as a savings account rather than keep their money in a bank.

Whichever  way it ends up being used, BTC definitely won't be our top priority like it is now, no matter how superior it is. Cause once the main reason most people buy, making a profit is gone, they won't have much reason to put holding Bitcoin first like they do today.

There is a point in your words, because many people buy Bitcoin and hold it for a long time in the hope of good profits in the future. However, I think that it is not only the price volatility, but also the possibility of price increases in the long term that attracts people more.

For example, someone bought Bitcoin for $1,000 today and kept it for five years, his main intention was not to profit from daily price fluctuations, but rather to hope that its value will increase in the future. However, no one can guarantee that that hope will be fulfilled. Another thing you said is also right that if the price remains the same for a long time, the purchasing power of that money may decrease due to inflation. However, not everyone holds Bitcoin just in the hope of profit. Many also value the convenience of maintaining their own control over their money and making transactions without the permission of others.

So I think that the purpose of holding Bitcoin is not the same for everyone, if you invest in Bitcoin, everyone should have a plan to hold it for at least 4–10 years or more, but it is better to aim for 10 years or more. So, while how long someone can hold Bitcoin depends on their financial ability, whether they are investing from discretionary income, regular income, emergency funds, and personal circumstances, it is important to have the mindset of storing Bitcoin for the long term.

Bitcoin is decentralized and no single entity controls it. This is why I'm accumulating regularly and building a  Bitcoin holding. A country's government can control the country's financial system by printing more money, but Bitcoin has a limited supply. No single entity can control Bitcoin, nor can it increase its supply.
Due to these unique characteristics Bitcoin has a store of value and the potential for future price increases. The demand for Bitcoin will increase but the supply will remain the same so the price will increase. I am accumulating Bitcoin for the long term to get high returns.