Many of them went bankrupt because they could not choose a good coin, many also bought only because they wanted a high increase regardless of the quality of the coins they bought, and when the market went down the coin coin would go down even further, ending in cut loss. So the suggestion is that I buy coins that have a clear project.
Or shall we say that many became bankrupt because of their emotion and intensive selling at loss?
They can't take the risk that they have taken after investing to crypto's. All they think was after investing, they'll see their money grow on their wallets without knowing that there's a risk.
Lack of knowledge led them to get into that situation, I felt sorry for them but that's how it goes when someone isn't prepared of what he's taking and investing with his money.