Some people think that every potential user/investor will care about its decentralized features or its high value.
Not specific to Bitcoin. People always trade decentralization for convenience until their chosen centralized system crashes. But what keeps the smarter of them from also hodling something less convenient that might still be there when the more convenient choices devalued through some accident?
Correct, this is not something that happens only to bitcoin it happens to everything that is less convenient than other options, for example lets take a look at smart phones, there is no doubt that smart phones are very useful tools but at the same time people have accepted to exchange that convenience for their privacy, there are phones that let you retain come level of privacy but do people care? Not really, as they are fine with that exchange, and something similar happens with fiat and bitcoin.