Be careful of this project.  I've been involved with it for some time now but sounding like a classic dump & exit just occurred.  It appears their Twitter & Telegram were shutdown yesterday and now talks on discord about team members dumping coins and disappearing 

I read a lot of bad info about sistemkoin but decided to test it out for myself.  Made a small BTC deposit and attempted to withdraw, that was over 2-weeks ago.  Contacted support and they said their developers are "working on the BTC wallet" and hence the delay.  Yeah right lol...  If it takes their developers 2+ weeks to fix their BTC wallet I wouldn't ever use this exchange for anything else anyhow!!  Complete SCAM site, stay away!!!

I've had 1x2 MN's for a long time but appears they dumped and ran  
Another scam goes down in the books I guess.....

Strange, when I attempt to hit https://stakedwallet.io it just errors out for me.  I guess it sounds like something I should avoid anyhow 

Might want to double check your wallet!  Looks like they took their money and ran off, I just went to checkout the site and got this:

This site can’t be reachedstakedwallet.io’s server IP address could not be found.
DNS_PROBE_FINISHED_NXDOMAIN

nslookup stakedwallet.io
Server:      8.8.8.8
Address:   8.8.8.8#53

** server can't find stakedwallet.io: NXDOMAIN