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Nobody knows if Steemit will be here in five years. Sites way bigger have failed and way smaller have succeeded.
I am pretty confident it will be around for a couple of years at least .
It’s not a ponzi or pyramid because there aren’t members below you to pay you with their money . Bitconnect is more of a ponzi . But I’ll read any arguments of the contrary.

that is an excellent point.

I have a question about the platform:

who runs it if the witnesses all decide to bail?

what will happen to your steempower then?

That's why there 20 of them and more than that for replacement. Slim chances of this to happen but really I don't know.

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