It means she wants to go swimming with you. Perhaps she likes swimming, and also likes you and wants to do both at the same time.
Make sure to only talk about bitcoin as it's the only important thing that a man and a woman can talk about.
My friend is coming over today as well, she lives very far. I'll make sure to only talk to her about bitcoin. Then we'll make a couple of altcoins for dinner.
We'll also roll around on the bed thinking of new features. Later we'll drink some beer and talk about HODLING. Not eachother. Hodling bitcoin of course.
We're not going to watch a movie, or cook or take a walk, or play some game. Unless it's related to bitcoin.
Sssshhh, careful! Some people will really take this as advice and be surprised if she leaves after 30 minutes (average time, may differ due to variance)!