The conclusion from me, it's not really gonna minimize your loss with diversification assets on a few altcoins.
I have the same perspective about diversification because all coin will get impact from his mother ( bitcoin ), I think diversification will not reduce risk but much bigger than before. Minimize risk only can doing by using stop loss and take profit point whatever coin you take, use realistic target to set range and execute. Basic trading knowledge and tools is not change until now but people psychology always changed, they only need to follow it and control emotion.
controlling emotions for new traders is indeed a very difficult task to do because usually new traders will use all their capital to get into the coin and after that the price falls will make them panic they do not have full experience about the price of cryptocurrency which could again become expensive and possible also impatient factors make them become losses because of selling their assets at low prices.