yes most will go Kaboom. Market is flooded with coins. Some must drown. Unless you are a fire ant.
Correct, we are in a huge speculation phase. Most coins outside the top 10 in market cap (and honestly, even a handful inside as well) are pure speculation plays, and don't currently offer any huge value propositions.
What we will see in the future - maybe soon - is a small group of coins break away and gain even more market share, while the majority of these multi-hundred million dollar market cap coins fall back into the "penny stock" valuations where they really should be. I think there is still money to be made by selecting a decent top ~100 coin, waiting for a pump and then dumping your coins. But unless it's BTC/ETH/XMR and maybe one or two others, I'm not holding for the long term.