how long will people still accept those crappy cryptocurrencies with high fees as value carriers?
Not sure to what coin are you referring to. Value carrier is Bitcoin but it's not crappy so you got a bit confused there buddy...
Anyway, what is currently happening with Bitcoin's fees is pure manipulation. There were talks for months about Bitcoin Cash being the true Bitcoin and it's what Satoshi wanted and all that crap. Before Bitcoin Cash fees were high sometimes but all manageable. Don't you think it's kinda strange that Bitcoin Cash only have low fees going for them, other than that its just copy/paste of BTC. Now people are looking for other currencies like you did and select one with lowest fee and say "yeeh guys the future king is here!!!". There where always other currencies with lower fee but do you see anyone wanting Waves or even Ethereum as payment when they are selling something ? Nope, It's just BTC (LTC recently). Bitcoin cash supporters are hoping that more people are thinking like you (well only newbs can do that, sad but true) and that is the point for creating this mess. If you cannot spot a manipulation when you see one don't invest in crypto because it's unregulated and it happens a lot (what happened 2 days ago was pure and simple market manipulation for example)
Edit: I just saw that you are pretty new here, I didn't want to be so offensive but it does really explain some things. Do some more reading
Friendly advice