Youre right, there are many hackers and scammers in bitcoin currency. and bitcoin is also a high risk. but with existing technology, all of that can be minimized, for example using a personal wallet to store bitcoins such as those sold on ebay or amazon, it can be used to avoid hackers and scammers. If its about the risk that the price of bitcoin fluctuates, instead it should be used for profit, from shorter trading for example. it all depends on the views we have. but why do many avoid bitcoin, in my opinion because they dont know how profitable bitcoin is. Suppose they know that they can profit from bitcoin, maybe they will start to be interested. maybe they also know that bitcoin is same as like common currency that is used for buying and selling.