1- I think that 60% of FTX users will go to trade on binance anyway.
That is possible, for sure. One could even suspect that Binance has triggered the whole drama with that outcome in mind (they get most of the customers without having to pay a penny), although I read today that their accusations to FTX which triggered the "bank run" two days ago were probably true. So I'm not so sure there.
Anyway I think the whole drama is likely to have a positive consequence which reduces the risk of similar events in the future, which you're mentioning yourself:
I have reduced my liquidity on exchanges by half. Many will do the same.
And I hope many do so. Exchanges should not be used to store coins. It is even good for exchanges if people use them less to "park" coins but to "trade", because a big amount of "parked" coins increases their security/storage costs (cold wallet management etc.) while not increasing their income (mostly from trading and deposit/withdrawal fees).
Of course, some trading strategies need a certain amount of "parked" coins (arbitrage, daytrading ...) but are they really
that important for the Bitcoin ecosystem? And high-speed transfers for arbitrage are also possible with Lightning now, although the number of exchanges supporting it is still limited.
It will take years to recover trust. If binance would help FTX we, as industry, would recover much faster - unless FTX would drag the binance to the bottom with it
Trust in whom? The "crypto industry"?
This is for me the most relevant point. The crypto industry should only require minimal trust, as they're only a gateway between Bitcoin and the "fiat world" but not a necessary component of the Bitcoin ecosystem itself. Bitcoin was made to minimize trust at all levels of the financial system. I think, as a consequence of all the hacks and bankruptcies, the exchanges must prepare for a scenario where people have less trust in them, and this is good.
Maybe it will hit differently this time now that they made headlines? I mean, CZ itself has proposed that crypto exchanges should adopt Merkle-tree proof-of-reserves and not run on fractional reserves, this will really come to fruition.
I hope that happens really and wasn't only a "marketing gag" by CZ. Exchanges without solid trust-building mechanisms should be ignored by the users. Learn - or close.