Instability is a huge drawback. You never know what will happen tomorrow. Unfortunately.
Depends really on how you look at it. Because some people even entered the market because it's votilaty to try to turn their money around and is the driving force behind the prices we have today as many people hop on this train to earn money at the end of the day. Because of votilaty mainly what people use is they see AR the current point in time the price and trade upon that. Another obstacle is ease of use as well as people are not educated well enough about their private keys and all that which may lead to them being scared to enter cuz if they screw something up they know there's no turning back their money.