It is important to remember that STEEM supply is increased by 100% every year, if the market-cap, or total value of the network, were to remain the same, it would require the Steem coin price to go down by 50%. Steem is subject to inflation. It is a short-term trading vehicle. It is not meant to be held for long periods; it is meant to be traded. Steem power is the long-term investment vehicle.
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From @santanu