do you mean the current high transaction fees are good for bitcoin? we always say that bitcoin is better than the banking system as a low-cost form of cross-border money transfer. but with the current situation, things are getting worse and causing serious congestion, not only the transaction fees are increasing, but the transfer time will also be up to several days. I don't think this is good for bitcoin's reputation.
if there is no regular buy and sell in the market, meaning demand for bitcoin falls, the price of bitcoin will plummet.
No, not trying to say that high fees are good, they create Bitcoin and transactions more valuable. Like silver and gold. Smelting gold needs more accuracy, experience. And you can throw a silver brick on a a pan and go take a coffee. Or like water in desert. It is expensive to get it (to transfer Bitcoin in our case). And if you are thirsty, you would pay any price to get a drink (Bitcoin).
People would avoid transferring Bitcoin, but those who can afford, will be able to pay (share) fees if they want to convert fiat to Bitcoin. Those who hold Bitcoin can start to dictate prices to those who wants to buy. There is always a demand for Bitcoin. But due to high fees, people would transfer less. Which might make people to buy Bitcoin for any price seller might set. I hope you get my idea.