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.
Affording isn't one of the main cause of them hating bitcoin . Anyone can afford bitcoin. They can buy fractions of it. The main reason why they bash bitcoin is due to lack of knowledge. They think that bitcoin is some kind of scam related to ponzie. More like a scam scheme where early users get benefitted and the late birds suffer the losses. They have no clue about how the technology actually works.