For example, they wanted to invest their money in Quarkchain, but bought the Quark instead. Which is a totally different coin. I know that it is probably the fault of the investors for not double checking the coin, but too much coins in the market also plays a big factor.
Yes, that's definitely the fault of investors who didn't bother about distingiushing QKC (which is Quarkchain) and QRK (which is Quark).
If one is not patient enough to analyze and at least rememeber the names of the tokens he would not be able to achieve success in crypto market.