No, I will never ever place all my funds into bitcoin, I strongly prefer to diversify my investment portfolio into many different areas, the crypto-currencies trading market are much more volatile as compared to other traditional investment, so it is safer to trade crypto-currencies with the amount of funds I can afford to lose.
Personally, I didn't put all my money in bitcoin or coins. This would be extremely risky for my money. I distributed them into different sectors.
This is the best option for me.