I'd like to get a crypto that I can stake for a decent amount of interest and which fits these criterea:

Doesn't have to have the client open 24/7.  I"m fine with leaving it running about 50% of the time.

purchasable on bittrex

I looked into buzzcoin but at 1200% the interest rate seemed perhaps too good for the coin to be sustainable, and I couldn't find it on bittrex.   Thanks!