This honestly is kind of an apples/oranges thing. think of your bitcoin address as a phone number (that no one knows who the number belongs to). you can "port" the number into as many wallets as you want, as long as the wallet will allow you to import a private key. the problem is that this is poor practice; you will expose the key to potential discovery if you keep entering it into fields. you never know if the device you are using is compromised in some novel way that an antivirus is not able to detect yet.
but to get back to the root question, i guess if you want to look at it, bitcoin addys are kinda of like phone numbers.
Thanks for your explanation.
It clarifies the security risk created by it being portable. I was thinking of it as an email address that you could open anywhere. On second thought, i can see that in addition to the risk of exposing the key to various platforms, email systems like yahoo and google are centralized, if I understand it right.
Thanks again