Well, I would not like to have all of my money in Bitcoins, it is too risky for me. I could lose big amounts of money by leaving them in the form of Bitcoins. So, I prefer having most of my money in cash, and just a little bit in Bitcoin for investments.
Yes i agree, i love bitcoins and i am using it since year 2014 but i still prefer cash, due to a limited use of bitcoins many are still using money or cash. Bitcoins are useful for investment but when it comes to basic needs, we are still converting it into cash thats why i rather choose cash. If all merchants will accept bitcoins then i think its no big deal between cash and bitcoins.