why can't anyone get lucky alexandrite? do they have to give up all their money AND their cards to do it?

Pretty much
When Gon and Killua did one of the requirements (giving the sick villagers everything they had) they had barely started and had nothing with them

ah okay.

another question. isnt bisky strong enough to take on genthulu? @_@

Regular bisky or GAR bisky?

because everyone is too lazy to do the questline to get it

well im sure if she got him alone, she wouldve used giant bisky

Of course she is. Gon fought Gensuru because he wanted to and because of the same reason Bisuke made him and Killua fight the serial killer guy to the death.

biscuit could win hands down