Mad because :
1. They can't afford bitcoin.
2. Too late to the trend, they are jelous of peoples who get into the trend long before them so that those peoples earn more than them.
3. They want to make peoples leave bitcoin and chose other digital currency which they have bought with the intention to raise its value, greed are disgusting when are too much that you do anything to get what you want.
4. Etc you can think of.
So don't mind those peoples, only sell your bitcoin or buy it when you see profit.
Here's my opinion:
1. The price of bitcoin is too high and the only one solution for them is too make news about bitcoin so that the people will scare of it. After that, they will buy in a low price.
2. Sometimes people don't appreciate the beauty of something, if they are late to discover it.
3. It is marketing strategy to buy bitcoin in a low price. Bandwagon effect, just to pull out the people from bitcoin then they will enter it if the price goes down.
For those who are mad of bitcoin, they are envied for those people who actually made the foundation to bitcoin, the one who started and the one who appreciate the bitcoin. Insecurities will eat the dignity of every human.