Okay that was the reason why the first karma disappeared, what of the second one?
As I said, I have no access to karma logs, so it was only my guess. And different users can give +karma or -karma for the same post. So you can get several +karma or -karma for the same post or for different posts.
The Op asked which of the altcoins can someone invest to get good profit and I said, from the list of coins examples (Bitcoin, Ethereum, Litecoin, Dogecoin etc), and when you look at the market cap Ethereum is the nearest to Bitcoin therefore it is the best altcoins to invest for good return.
This is a forum, so you are not talking just to the one who opened a topic, you are participating in the discussion. Of course it is important to know what is the start of this discussion, but the thread didn't end on the first post, there are many other posts. And other users who participate in the discussion in this topic can be disappointed with a breaking post not following the line and giving nothing really new to the discussion.
When you argue with me, it will hardly give a result. It was not me who gave you a -karma. If all your posts were good, I'd compensated your -karma again with a +karma, but you insist that you are right. And it's your right. I gave you advice and it's your right not to follow it.
I am still saying that someone is behind this. And the person is abusing karma system.
As I said, you can appeal. And I gave a link where you can find all info about how to do it.