ETFs would certainly open the floodgates to the general public.
After the last run up and correction, there are probably many who took that hit on the chin and have a bad taste in their mouths. Lol
The legitimacy an ETF offers (to the general public anyways) will be a welcome dynamic to the market, but ultimately owning and managing your own Cryptocurrency is far more rewarding.
Honestly I'd trust CryptoTwitter with my keys and financial wealth over any big wig investment fund!