Get out of Yahoo now?

I'm actually very worried about Microsoft getting my email. I'm wondering if I can and/or should decommission my Yahoo email before Microsoft is able to scoop up Yahoo. I really don't want to do it if I don't have to, and really, I'm not sure I can - I just have too much tied up to my yahoo email account. Not just all of those contacts, but my email address is used to get into any number of online services, bank accounts, etc.

Not a good situation.