Because some people like to keep things separate, for instance, a seprate wallet to save bitcoin, one to use on a daily  basis, one to gamble. These are just examples as to why some people prefer to use multiple wallets.

Bitcoin can make new banks stronger. If a bank integrates bitcoin in its payment system and provides bitcoin related service, this bank will be very popular.

It would seem that everyone on this message board thinks that Bitcoin is worth it, why else would we be here?  Yes, it is worth it to me - not only for the potential monetary gain but also for what it means for the entire world.  Believing in Bitcoin is worth it to me.

Definitely not. Bitcoin needs to find stability first. Don't want to see my income goes 10% down in value a day after.