Yes, STO's can be a new attraction for new money to come into the crypto market.
I see many people are tired with utility tokens (especially token without good mechanism) where they don't get anything from holding it and just hope the price will increase.
I believe as well STO are what this market need to get back on it's feet, not on the short term i reckon, but perhaps within 2019
A lot of big people said that new mainstream in crypto is security tokens. So may be 2019 will be like 2017 for ICos but for STO. And may be DUck will be "Ethereum" for STO? I think they must hurry up with development to became first in this niche...