I have some coins idling around in my wallet but I cannot bear to put it in hyip or risk it. But it is a waste to let it idle around. Yes. I have coins in some "lower risk" hyips to generate some interest which I'm prepared to write off. I also have some coins converted to hashing power in hashnest and BW.com but it has to be monitored else you will suffer a loss instead. 
Unlike fiat currencies, I cannot park these coins into banks backed by governmental institutions. I put my fiat currencies in banks or blue chips but I cannot do it with cryptos.
So, what do you do with your idle coins? Let it sit around?
in my opinion,idle coins is mistake,i buy coin which dont have good future,coins which have bad reputation,i almost dont have coins like that,really wasting time to buy coins like that,and of course wasting my bitcoins,now just focus to buy good coins like Etherum,Monero or Litecoins.Unlike fiat currencies, I cannot park these coins into banks backed by governmental institutions. I put my fiat currencies in banks or blue chips but I cannot do it with cryptos.
So, what do you do with your idle coins? Let it sit around?