I think investing is such a broad word, are you investing just because of curiosity, hobby or passive income?
Are ASICS still worth, yes I think they are still, specially the new Bitmains.
If you're planning to invest on a small hash rate as a hobby and just to satisfy your curiosity, then go for it but don't expect great rewards for it.
I was wanting to get one or 2 just to run in the background while I get on with my day to day life, and just make a small monthly profit. But long term I need to know if I'll continue to make profit or if I'll be spending more on ASICs before I actually have a chance to break even.
With the BTC volatility right now, ugh ugh nope maybe break even would be 11 to 12 months.
I think BTC is good for the early starters, those who have establish them selves, big investors, all of them have ROI already, so adding up a new miner is no problem.
Invest only the amount which you are comfortable, don't spend money you can't afford to lost.