If I invest 1 BTC in TEK and get at least 30% per month, then I get 23 BTC after one year? Or may be it is some mistake?
Wrong, 1BTC staked monthly at 40% will yield 56.6BTC in exactly 1 year if you do not sell any of the stakes. You were not considering the compounding interest.
I made about 15 BTC in 3 months from Tek a while back. I bought around 1.2 BTC worth at around 1,000 sat, and staked for 3 months. Meanwhile, the price went up to over 5,000 sat and I couldn't resist taking my profit. True story.
Tek literally saved my trading career after I took huge losses from Litecoin and Bitcoin in early 2014. Tek has been around for a while and we should see a big rise in price soon. The dev has plans for it and is very active. With prices as cheap as they've ever been, NOW is the time to stock up and stake up!
Reed attentively, I said 30% not 40, because now you never get 40% or will be wait more then 30 day to get 40, and lost recapitalisation.
I made 8 BTC when buy TAK for 1 sat and sell for 9 on cryptsy, but now all my coins gone with cryptsy. True story.