be great if "I am not satoshi" but added the words "I am not satoshi but I was bitcoiners" it may be better
Your sentence make absolutely no sense .
Maybe I can help. I studied translation for several years (

): '"I am not satoshi" sounds great but it would be even better if completed with a second sentence saying "... but I am a bitcoiner" (likely on the back of the shirt, I guess)'.
Not that I agree with it. tough

I'd go for "I am Satoshi" on one side and "Seriously now, did you actually believe I would tell you if I was him?" on the back. Mindfuck.
That would be a funny shirt, but a lot of people won't get it. I think OP should do it though,