well, if you've already lend money there you know it is "safe", you only lose if poloniex suddenly goes down. there's no chance of someone takes your bitcoin because it's used at margin trade, when they close the operation your bitcoin+interest comes directly to you.

yet, i've used the lending example just to ilustrate how bad is XEM node(xem currency still good, i just dont see a good reason to run a node). Want another example? you can run a dash node for ~20btc and receive way more per month.

doesnt like dash? well, me neither so another example.
Xvc incentive node cost about 2btc, AND WITH 2 BITCOINS you will receive more then running xem node......

there are others examples too...

and again, i'm holding xem, i always recommend people here in bitcointalk to invest in XEM, yet... the node seems a very bad investment and if i'm missing something please enlighten me.