I agree with a lot of your comments on this post but I'm not sure if you want to include LTC in that list of examples.

I can see BTC and ETH having long term value but I'm not so sure about LTC.

LTC'S main claim to fame seems to be that Charlie (it's creator) was working at Coinbase and managed to get it listed there.

Apart from that it appears to be a bunch of copy pasta code from other projects.

If you want to see a perfect example of this, check out this post on why LTC is "faster" than BTC:

https://twitter.com/r_Buttcoin/status/951585800147390464

The main thing I use LTC for right now is buying ALT's from other exchanges because its network fees are cheaper than ETH/BTC/BCH. I don't see this situation lasting forever especially considering Charlie (LTC'S creator) recently unloaded all of his LTC.