Most of them are mad because its their first investment and because they are unable to earn quick buck and profit from it. But between doing everything here for money for me personally theres deeper meaning that cryptocurrency provide us, but that doesn't matter as most of people don't care because they are blinded by money and want to just rush in
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.
3. This is true as well, because if they invested in some alt they want others to buy it and thats why they yell at other coins that are trash and are trying to pump coin that they currently hold
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Or they could be mad at themselfs for not seeing opportunity specially if they heard something about it in the past.
They are mad when they are dumping their coins when they see that price sliped some low %