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Yes it does, anything you have the private key in your control.

I would say to just hold if you have any currency other than bitcoin, but if you have bitcoin, right now is a good time to put it into USDT

And miss the opportunity to double your bitcoin ? I am not so sure it's a good idea...

yup! paper is awesome but I'm so forgetful and lose things all the time. no matter how important it is, it gets lost.