Dogecoin has the LOWEST FEE. Bitcoin transaction fee is too high. Dogecoin is not available in other exchanges so the other option is VERGE. Since BlockTrades supports DOGE but not Verge, I use DOGE. :)
Please see fee comparisons here: https://steemit.com/sbd/@pinay/sbd-cash-out
Bitcoin transaction fee has lowered this year but still higher compare to Dogecoin and Verge. :)
Orayt!