what is the main advantages of buying the masternodes and ... what can we get if we hold them long !!
how to choose a good masternode , how can we know that '' good masternode is this ''...
what are the main specifications that we must mention in their project ,,
and aanother thing ...
how can we findout that the project is good or scam

every form of operating in blockchain system has it's own disadvantage.
like masternode, it's quite easy to use and energy saving. but the downside is when there are too little nodes, blockchain has high chance to collapse