There is a @null account in Steem Blockchain and the tokens are sent to this account to burn the reward.

That was completely unknown to me. I thought someone created @null for fun purposes. Thanks for this information.

What he does is simply to trade the tight range of $0.95-$1.05. He always feels confident that being pegged currency it will touch $1 anytime. And that's the trick. He simply buys it at $0.95 and sells it at $1 or $1.05.

Great strategy. Massive income with low risk. Personally, I hold steem too. I wait for 15-20 days. When the profit margin goes around 20-25% , I sell them.