If one bitcoin is just small percentage of your personal wealth, if you lose it, it will not affect you, then buy one.
Yeah right, but I think many of us here can't even afford to buy a bitcoin...So I think for them, it is a great investment and they are waiting for the profit when the price increase... So I think, even if it costs half of your savings, It will still be a good investment...

Others couldnt afford a whole coin because they use it to sustain their needs and others gamble it away ending up having nothing.