Yes, once a creator gets coin donations they will be able to get actual money from it. Real money.
Right now creators can get real money from ads on the website. They have to accumulate $25 and then they can request a PayPal payment.
The coins will work in a similar fashion. I believe it will still be $25 before a withdrawal can be requested but it will cover both ads and donated coins.
PayPal is worldwide so it should work for all the places you mentioned.
Donations aren't ready quite yet but they are coming fast.
Another thing you will be able to do is actually EARN coins from watching ads. This should actually be available THIS WEEK!
So, when all the pieces of the puzzle are put together you'll be able to: 1) Earn coins by watching ads 2) Turn around and donate those to your favorite creators 3) Repeat 1&2
Donated coins will only be able to be cashed out...at least in the foreseeable future.