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If you have not registered your key pair within 48hrs of the ICO ending you will lose all your tokens.

I purchased eos tokens, what is a key pair and can you explain further?

the ico ends next june 2018 so you have time go to eos.io and you can find out about paring the token so that when they go live with the eos blockchain you will have the tokens on that chain. They have all the info on there site on how to do it.