I would love to have option

[bracek]

to copy the best traders' moves on bitcoinica

etoro offers something like this,
after making a deposit,
just decide what % of your money will you use to follow trades of top earning traders

I would certainly do this.

Actually, I do not understand how this is sustainable, but it seems to be, so, why not ?

[bracek]

i think it is done as some bounty chase for being the best performing trader of some period

I do not know who puts funds into that bounty