This is exactly why stablecoins like USDT, TUSD, DAI, Libra, etc. won't gain much popularity.
I totally agree, and I'm not even sure why anyone would want to own any of those outright--I can see the need for them on exchanges, where you'd want to have a cash equivalent (maybe) in order to make more trades or something like that, but why bother holding a stablecoin instead of cash?
I really don't think there is anything above Bitcoin at the moment, but as of now, we are on the verge of there being a 4th generation of Blockchain technology.
That may well be true, but bitcoin is still rocking the house as far as cryptocurrencies go, except for its price lately. But every other crypto, including ETH, has also gotten hammered by the market. It doesn't matter if bitcoin doesn't achieve mass adoption as a form of money. It will still remain a good investment tool. It's got the strongest community by far, lots of miners, lots of support. All of that can't easily be taken away from bitcoin, believe me.