Right but there are better cryptos for all of those purposes (Ethereum, Monero). Right now Bitcoin's only killer app is the name recognition and the fact that it's increasing in value, which is tautological and why I think it's bound to decline in importance compared to other crypto.
I think you're underestimating the power of network effects and critical mass. Even when a product (or protocol) has major flaws, it can be an insurmountable obstacle for potential competitors, regardless of how much better they might be otherwise. Bitcoin is going to be extremely difficult to catch on this front unless it has a true meltdown or there's a fundamental shift due to legislation.
That's fair, but while my 19 year old younger brother has heard of Bitcoin and not Ethereum, the same is not true for developers. I think there is some information asymmetry and a discrepancy in the quality of the users between networks - by quality I mean how likely users are to contribute to new software to make it better, the level of what is essentially corruption/bureaucracy in making changes to the platform, etc.
Facebook and Snap did well because they were "cooler" than their predecessors, and they had different/more uses. I think that's analogous to where I see the future of crypto
If you're a CTO of a major company and you don't have a wallet with at least $1m in BTC in some wallet somewhere then you're risking a major disaster if someone breaks in and locks up your data.
But just because there are real uses doesn't mean that I think that the government will allow it to remain legal.