it's that (if we take this forum as an example) people are simply forced to spend their BTC for living costs and cannot afford to keep them long-term.
I get that, but many people don't live paycheck to paycheck, and leave some funds as savings. For those who choose to put their savings into fiat currency, it is just extremely dumb to leave them lose their value around 50% every 5 years. If we were to look at the global distribution of wealth, then we can say that apart from the US, the Western EU, Canada, Japan and the UK, all others are not in a position to afford to save in the long term, and especially to invest in Bitcoin, which many do not understand at all. I don't know if there is any data anywhere that would show how much an American or Japanese person saves per year on average compared to someone from Argentina or India, but it seems to me that we would find very big differences.
I have never hesitated to pay for something with BTC regardless of the price, because if I had just invested for the past 10 years and never taken a profit one way or another, it would have felt very strange - because BTC was conceived as a cryptocurrency, not what it has become today.
Many of us understand what it represents today, though. It undermines its value to describe it merely as a "currency" for internet purchases. It is much more than that, and I believe the most important aspect is that it allows people to save for the future; especially for those of us who experience it before it becomes a global reserve asset. Not only can we save, but we can also grow our capital over the long term by a factor of 100x.
And all you need to do is to just hold it.
I agree to some extent, I also use BTC as a hedge against inflation and it has proven to be superior to anything else so far - because in about 10 years I turned an invested $200 into almost $100k and I think many people find it hard to believe that such a thing is even possible. However, if I went back in time to check how much BTC I spent during that time, I certainly wouldn't get a small number, but even though I understand that I could be even richer today if I were just holding it - I still don't regret it because I believe that BTC should preserve its primary function, which is to use it as a currency from time to time.