Different people have different strategies to avoid relapsing, there are no hard and fast rules unfortunately.
What I think may be a viable option for yourself is to self exclude from each poker site individually.
Bitcoin as I understand it to be is a virtual wallet and as such isn’t bound by any code of conduct concerning gambling. However I’m fairly certain that all gambling websites must have some kind of responsible gambling policy and must offer their users the option of self exclusion.
Send an email to them stating that you are a compulsive gambler and you wish to exercise your right to self exclude for the maximum period.
Self excluding however will not stop you being a compulsive gambler. Unfortunately nothing will. It is very hard to accept the fact that you are a compulsive gambler and you must be honest with yourself first and foremost to establish this fact.
You ask “Why do I go back” I think that perhaps the answer to this question is you go back because you are a compulsive gambler.
To me recovery has a lot to do with acceptance and once you can accept that you are a compulsive gambler, then in my opinion, you have taken the first step towards recovery. It isn’t an easy journey but recovery is priceless and worth the struggle.
For your own sake and for the sake of those close to you do those self exclusions now.
Take care, I wish you well.
Geordie.