I think a correction is good for the market, that's what happens everywhere. On the other hand it would be necessary to define what is a correction and what is a crash.

It's undeniable with the rise that there was last year the correction seemed inevitable, but I didn't think that it would be so long and so violent.
What worries me the most is to see some ALT return to the price they were before the rise, it becomes pure speculation without any interest in the project (fortunately this isn't yet situation for all crypto but it could become it)

Obviously it also gives bad image of the crypto, after this crash it will take time to regain investor confidence