Article claims bitcoin mixers are no longer safe

[traderethereum]

1. The mixer will still help people to be hiding, and it still safe to use any mixer service available, but it depends on them about how they can be the good mixer which always protects their transaction.
If they are very good to handle every problem from many things, then the mixer will work without any problem.
2. Using 2 mixers will help to make one person anonymous, and it is hard to know from where the transaction goes.
3. The mixers will take their part to still hiding their customer identity so it will make the mixer can get a good reputation among the crypto user.

[DreamStage]

If the mixer get's hacker or releases users data you will no longer be safe of course.
Sure not every mixer follows what the article in question stated. Nevertheless you have to be careless of what you are dealing with specially since it's your money involved.
If they are no longer safe, pherhaps in a term of how many addresses are there and how much hackers technology has evolved to get their hands onto your Bitcoins.