I'm not that pure risk taker and a greedy person so i don't put all my funds into bitcoin because that seems very risky move and that move has a lot of potential in losing money. I just putted or invested at least 45% of my earnings per month into bitcoin and i treat them as a saving and that way is making me feel comfortable and safe because i have both savings in bitcoin and also in fiat.
I would say that forty five percent is a little high, but if it was something I could afford to lose, I would not see a problem. Under Bitcoin's current conditions it's unlikely that a major crash will happen, but if BU gains much support, there's a chance that Bitcoin will fork and the community will split because of the scaling debate, and this is a possibility that should be considered.