MN ROI is lower now... with the stable hash, the 3,2k mn and the dash low price (2.40) 0.01% per month?
I won´t pay 2300$ if I just get 23$-5$(vps)= 18$ per month
I think your numbers are off. You get about 2.8 DASH every 5.6 days. So per month you get 15.5 dash. Let's round down to 15 and use your $2.40/DASH price. $36/month - $5 VPS = $31/month. (I pay about $2/mo with my VPS so shopping around can save you more.)
$2.40/Dash X 1000 = $2,400 investment.
$31 per month/$2400 invested is 1.3%/month or 15.5%/year. Do you have other investments that can get a 15.5% annual return?
In fact, even if DASH lost 10%/year you would still be making a 5.5% return which is better than any bank account or CD. On the flip side, if dash increases 10%/year you will get a 25.5% return.
If you did buy DASH at $2.40 each, as of this post they are trading about $2.50 so you would be up 4%. If you feel like selling at $2.40 now, I am sure anyone here would be happy to help you out.