1. Don't understand what it is. New way of scamming?
2. Not your keys not your coins
3. Don't understand what it is. New way of scamming?
You leave in 2017? Market changed a lot in last 3 years and if you don't know whats the name on BIGGEST DEX, what is liquidity pool, what's the difference between 2014 CEX (scammy shit) and 2021 good and reputable CEX (CEX'es are now being listed on nasdaq - $77B coinbase listing on nasdaq) than your table with "tech 1-10 scale" is useless.
If a coin don't have it own secure wallet no reason to look into it.
Or its big-brain coin that is compatible with ETH infrastructure and can be stored using any ETH wallet like BNB (BSC chain). Man ... its 2021. You know?
Posting a list of 1-5% apy coins on the top of the bubble ... when every coin listed here can dump 99% in next year or two is a "way of scamming". Or at least showing the worst possible investment indicator.
Now your post still make no sense to me. This have nothing to do with Coinbase.