Watching the current market and the demise of ALL crypto ... is this the end for certain coins?
It depends on what coins are you talking about.
If you are pertaining to those low market cap coins then yes. Most of them will just end up being abandoned during this bear market because right now, it's a survival mode for them. If they can't survive this bear market then they will not survive for a long time.
How do people think the likes of ETH, ADA, XRP, TRON etc will go from here?
ETH and XRP will be here to stay that's for sure.
Look at the recent image posted by Coinmarketcap. During the last 7 years, Ethereum and Ripple stayed in the top 10 and they will stay there for a long time. As for Cardano and Tron, Cardano is at the top 10 in the last 2 years while Tron isn't in the top 10. What I'm trying to say is that not all coins will always stay at the top but for sure, these 4 coins will stay at the top because they've been here for quite some time.