Right now witness voting is the biggest thing. I will copy paste the usual - if you are aware skip to next paragraph if not, read it.
To younger readers - witness voting has nothing to do with your money its about choosing right people to run the network. Since it needs constant verification and some skill to read up what's going on there is a proxy option. If you want me to be your witness proxy click this link - https://steemconnect.com/sign/account-witness-proxy?proxy=kingscrown&approve=1
Or you can go to this page, browse to very bottom and put me there (remember as proxy not as witness vote): https://steemit.com/~witnesses
Now a lot of people buy STEEM and power up to support witnesses and network. I show here how you can semi-auto support network (power up steem, do power up posts, proxy votes - https://steemit.com/steem/@kingscrown/semi-manual-way-to-support-steem-blockchain)
Where to buy STEEM ?
From those only 2 (from my knowledge) will allow you to withdrawal - Bittrex and VCC. Binance and Huobi for now are stuck. HitBTC is stuck since 1-2 years and Probit/Upbit not sure.
So to support STEEM its suggested to use any of those two and power up.
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