The first and foremost mistake by new tiew investors in the cryptocurrency is the lack of knowledge on how really volatile the market is and why is it that way. Another is that their lack of understanding on how to invest to the right cryptocurrency or ICOs as not all of them will provide profit the way they like it.
The first mistake is that people consider crypto currency as an investment basically it is not an investment just the people are making money through its speculation so don't expect to make money from investing your money on ICOs basically in short term because most of the projects even failed to make into the exchanges.And other common mistake is that investing on the projects without any knowledge just get attracted into that by someone investing on it which leads to mass loss also.